Efficacy of a Web-Based Intervention (Smart Choices 4 Teens) for Facilitating Parent-Adolescent Communication About Relationships and Sexuality: Randomized Controlled Trial

Background There is a need for interventions that promote healthy decision making among adolescents and leverage the ongoing impact of parental relationships through older adolescence and young adulthood. These interventions should maximize adolescent engagement and be easily accessible to families in terms of cost, duration, and logistics related to participation. Objective This study aims to test the efficacy of the healthy relationships and sexual decision-making component of a web-based intervention for older adolescents and their parents, ascertain whether the efficacy varies by gender, and assess its efficacy over time. Methods A randomized controlled trial was conducted for the web-based, self-paced intervention Smart Choices 4 Teens from 2014 to 2015. Families (N=411) with adolescents aged 16-17 years were randomly assigned to the intervention or control condition. Surveys assessing aspects of sexual communication were administered at baseline and at 6, 12, and 18 months. Generalized estimating equations were used to determine the impact of exposure to the relationships component of the intervention on sexual communication by parents, as reported by adolescents. Results Less than half (88/206, 42.7%) of the intervention group participated in the third and final intervention component, which was focused on relationships and sexual decision making. Participation in the relationships component increased the frequency of parental sexual communication and increased the number of dating rules after accounting for other significant adolescent characteristics. The impact of the intervention varied little by gender, although it did demonstrate an impact on communication reports over the follow-up survey administrations. Conclusions Smart Choices 4 Teens demonstrated efficacy in increasing the frequency of sexual communication between parents and adolescents in the long term. Trial Registration ClinicalTrials.gov NCT03521115; https://clinicaltrials.gov/ct2/show/NCT03521115


Background
Adolescents frequently report that parents are their preferred source of information about romantic relationships and sexuality [1,2].Often, this communication is more focused on daughters [3] than sons and more often initiated by mothers than fathers [4], although fathers' communication has been shown to increase after participation in interventions [5,6].Higher amounts of parent-adolescent communication, regardless of topic or other characteristics, are strongly related to increased adolescent safer sex behavior [5,7,8].Furthermore, the connection between parent-adolescent communication about sex and adolescent sexual behaviors is robust, firmly established [8], and durable through older adolescence and into young adulthood [9][10][11][12].This underscores the importance of encouraging and assisting parents in communicating with their adolescents about sexual decision making.
Recent reviews of interventions designed to facilitate sexual communication between parents and adolescents [6,8,13] indicate that many interventions significantly increased parental levels of comfort and the amount of communication about sex.However, one meta-analysis found that most interventions that address parent-adolescent sexual communication focus on parents of younger adolescents (early adolescents), are often group-based with a trained facilitator, and tend to focus primarily on parents, with very few studies including adolescents [13].Many of these programs are provided through schools [14,15], medical clinics [16], and community centers [17] and require a substantial time and logistic commitment on the part of participants.Although some programs demonstrate efficacy with their prioritized populations, there is a need to include adolescents within the intervention while extending the reach to a broader audience and more diversified populations for whom time constraints, logistics, and delivery costs present compelling barriers to intervention participation [18].Digital and web-based delivery platforms [19], including DVDs [20], videogames [21,22], email [23], websites [24], text messages [25,26], and social media [27,28], are increasingly used to address these barriers [29].These delivery platforms hold promise as most families have computer and internet access, including via smartphones (89%) [30].

This Study
To summarize, there is a demonstrated need for interventions that support sexual communication between parents and adolescents that (1) support the continued relationship with parents through older adolescence and into emerging adulthood; (2) engage the adolescent in full intervention participation; and (3) address common barriers such as time limitations of participants and reduced cost via delivery in an easily accessible format for families.This paper aims to examine the adolescent report of sexual and relationship communication outcomes for a web-based intervention, Smart Choices 4 Teens, delivered to parents and their adolescents (aged 16-17 years at enrollment).The program focused on building communication between parents and adolescents on important issues related to adolescent alcohol use, sex, and romantic relationships.The program also provided the skills needed by adolescents to address the social scenarios that they may encounter.Smart Choices 4 Teens was self-paced, on the web only, and contained three components for both parents and adolescents-(1) introduction and parent-adolescent communication skills, (2) adolescent alcohol use, and (3) adolescent relationships and sexuality-and was tested in a randomized controlled trial with 411 parent-adolescent dyads.Results from the alcohol use component have been previously reported [31]; the adolescent relationships and sexuality component is the focus of this paper.Consistent with the theoretical frameworks of the intervention from which it was adapted (see section Smart Choices 4 Teens Intervention), we hypothesize that adolescents who had been exposed to the relationships component of the program, compared with those who did not, would report increased sexual communication with their parents (a main effect of intervention exposure) and the increased sexual communication with their parents would vary by gender of the adolescent (interaction effect between intervention exposure and gender).

Participants
Families with adolescents aged 16-17 years were recruited from US-focused web-based panel vendors, companies that matched and recruited participants for targeted survey studies [32], between November 2014 and November 2015 (for an in-depth description of our web-based panel methodology, see the study by Wang-Schweig et al [33]).As shown in the CONSORT (Consolidated Standards of Reporting Trials) diagram (Figure 1 and Multimedia Appendix 1), panel vendors provided contact information for 1531 adult panelists via a secure shared website.Among these, 559 were eligible (ie, parent with an adolescent aged 16-17 years; English speaking; and with a compatible tablet or computer for viewing the web-based intervention).The research team made separate contact with the adolescent to ensure eligibility, ascertain a separate email for the adolescent, and ensure confidentiality.Among the 559 eligible panelists, 411 (73.5%) families completed baseline web-based surveys and were enrolled.Parents provided consent for themselves and permission for their adolescents, whereas adolescents provided assent for themselves; they were then directed to the research website where they completed separate, confidential baseline surveys.Each participant received US $30 for baseline surveys, US $40 for 6-month follow-up surveys, and US $50 each for 12-month and 18-month follow-up surveys via a mailed check.All study procedures were approved by the Institutional Review Board of the Pacific Institute for Research and Evaluation.
Using a 1:1 allocation ratio and a computer-generated program, parent and adolescent dyads were randomly assigned to either the intervention (n=206) or control (n=205) condition as a randomized controlled trial without a waitlist control group design.Dyads in both conditions received links to resources, including hotline numbers and websites providing information about adolescent alcohol and drug use, sexual behavior, suicide, support for gender and sexual minority adolescents, and other health issues.All families also had access to an 800 number throughout the duration of the project for contact with the research team.Automated emails and texts were sent to invite families to complete the follow-up surveys at 6, 12, and 18 months after baseline.One week after the follow-up survey, invitations were sent and reminder emails or texts were sent to participants who had not completed the surveys, with the emails or texts repeated after another week of nonresponse.If not completed within 2 weeks, phone calls were made to the participants to encourage completion.

Smart Choices 4 Teens Intervention
The intervention was targeted to older adolescents (aged 16-17 years) not as sex education but to address decision making and skills needed in the context of increased independence and sensitivity to the needs of adolescents who may have initiated some alcohol use and sexual behavior.The intervention sought to increase parent-adolescent communication and build skills to address scenarios that adolescents encounter related to alcohol use and romantic relationships.Facilitation and clarification of adolescent choices were guided by an offline discussion of scenarios derived from real stories that require decision making by adolescents.These discussions offered opportunities for the values of the parents and adolescents to be considered.Specifically, what constituted smart decision making was determined by the families and not asserted by the intervention.Smart Choices 4 Teens was created by adapting materials from two evidence-based prevention programs that are both booklet-based and independently completed by families: Family Matters [34] (designed for parents of younger adolescents) and A Parent Handbook for Talking with College Students about Alcohol [35] (designed for parents to prepare their adolescents for the first year as college students).Family Matters addresses theoretically derived risk and protective factors important to adolescent alcohol and other drug use and emphasizes parental characteristics (eg, supervision, support, communication skills, attachment, and conflict resolution skills) that can be strengthened to influence adolescents' risky behaviors.Strengthening adolescent characteristics (eg, educational achievement, communication, conflict resolution skills, and response to peer pressure) in the context of the parent-adolescent relationship subsequently creates resilience in adolescents and decreases risky behaviors.These characteristics are central to theories of socialization [36,37], social control [38,39], social development [40], and family interaction [41].Content for the program is based on social learning and communication theories [42][43][44][45] and is delivered in booklet form to be delivered by parents to adolescents.Parent Handbook is designed for parents to provide practical approaches to address alcohol use among adolescents and is designed to address problems for adolescents making the transition from high school to college.On the basis of a theoretical approach that takes into account the importance of social, cognitive (eg, beliefs and social norms), emotional, and decision-making aspects of college drinking, Parent Handbook is effective in reducing drinking and drinking-related consequences, influences perceptions of drinking activities, and impacts perceived parental and peer approval of drinking [46].Both programs have evidence of efficacy and effectiveness and were adapted for the following considerations: (1) age appropriateness for those aged 16-17 years; (2) parallel materials for the adolescent; and (3) delivery of the materials to a web-based platform.The adaptation process included creating instructional objectives, content outline, activity descriptions, and scripts through a series of iterative development cycles that included review by an expert panel and input from two rounds of focus groups with parents and adolescents.Additional information on the adaptation of the interventions is available with the results for the alcohol component [31].
For each component, Smart Choices 4 Teens required that parents and adolescents complete web-based materials separately.Following completion, they chose two of four possible scenarios for discussion.These scenarios were designed to use the skills and knowledge addressed in the component activities.After the discussion was completed, the participants moved to the next component.Given the imposed chronological order of the components, families first completed the communications (parents: mean 28.The goal of the relationships component was to foster communication around healthy relationships [47], increase parental monitoring [48][49][50], clarify expectations and values, provide skills for making healthy choices around the decisions related to relationships, and encourage reflection on decision making.This component was divided into five sections and was delivered via a video narrative, infogadget (activity with a series of tabs on a single topic, containing graphics and text), and interactive activity: (1) acknowledging how challenging parent-adolescent communication about relationships and sexuality can be (video narrative); (2) reflecting on healthy relationships (readiness for a relationship [interactive activity], prioritizing partner characteristics [interactive activity], and signs of emotional and verbal abuse [video narrative]); (3) smart decision making and sex expectancies (interactive activity), unintended health consequences such as pregnancy and sexually transmitted infections (infogadget), social media responsibility (interactive activity), and refusal skills (video examples); and (4) values and guidelines (interactive activity).
Following the completion of the web-based materials, the families were asked to engage in an offline discussion, guided by four real-life scenarios pertaining to the complexities of relational decision making, which were drawn from focus groups with adolescents for another adaptation of Family Matters [51].The scenarios were presented as dilemmas facing an adolescent and created an opportunity for a dialog about the options that the hypothetical adolescent in the story had for addressing the dilemma.The four scenarios included (1) facing a situation in which adolescents were deciding whether to have sex within the context of a relationship; (2) decision making about relationships in the context of other friendships (dating a friend's sibling); (3) an adolescent who encountered a friend who had passed out from alcohol use and was possibly vulnerable to sexual or physical assault; and (4) relationships between individuals with large age discrepancies (adolescent girls and older men).Families selected two scenarios to discuss offline and were prompted to download a tailored discussion guide for the parent-adolescent discussion.Given the normative increase in sexual exploration of older adolescents and an imperative to protect their privacy and potential safety, activities requiring communication between the dyads were designed so that self-disclosure on the part of the adolescents was not required (any sexual behaviors, sexual orientation, etc).

Measures
The following naming convention is used for reporting on the waves' descriptive and reliability statistics: baseline (T0) and follow-ups for 6 months (T1), 12 months (T2), and 18 months (T3).For all measures, baseline assessments were phrased to indicate a general (or ever) assessment, whereas the follow-up surveys explicitly asked for an assessment within the past 6 months or since the previous survey.

Overall Sex Communication Frequency
The overall frequency of sex communication was assessed with a single item adapted from the evaluation of the program Parent Handbook for Talking with College Students about Alcohol [52]-"Overall, how often have you talked to your parent about sex"-with response options ranging from (1) never through (5) very often.

Topic Specific Communication Frequency
Teens reported the frequency of ten specific parent-teen sexual communication topics [41] ('How often have you and your parent talked about your having sexual intercourse and…') with responses ranging from 'never' (1) to 'very often' (5).Topics included 'the negative impact on your social life because you would lose the respect of others', 'the importance of being committed to a healthy lifestyle and how being in a sexual relationship can impact this', 'how embarrassing it would be if I caught an STI (sexually transmitted infection)'.The mean score of these items was used for the analyses (T0: α =.92; T1 α =.94; T2: α =.94; T3: α =.94).

Topics of Conversation About Sex
Adolescents were asked to report whether their parents had talked about specific topics with them, adapted from the evaluation of Family Matters [53].Items were summed for one total score and summed by topic area as detailed below.

Delaying Sex
Three items asked whether a parent had cautioned the adolescent not to have sex, not to have a serious relationship in high school, and not to have sex specifically because their religion or values forbid sex outside of marriage.A sum of the three items was taken, and reliability was adequate (T0: α=.62; T1: α=.64; T2: α=.68; T3: α=.70).

Birth Control
A single item asked, "if you are sexually active, [your parent(s)] will provide birth control."

Monitoring and Dating Rules
Adolescents were each asked about the expectations for behavior in romantic relationships that they had decided upon [54].They were asked to respond no (0) or yes (1) to a list of 15 possible rules, for example, "no dates on school nights," "come home at an agreed-upon time (curfew)," "use good judgment," and "be a gentleman/lady."Responses were summed.Internal consistency was good (T0: α=.83; T1: α=.87; T2: α=.86; T3: α=.89).

Program Participation
A measure of program participation was captured in two dichotomous variables-one for those participants who only engaged with the communication and alcohol components (0 all others) and one for those who engaged with some or all of the relationships component (0 all others).Thus, participants in the control group and those in the intervention group who did not initiate the program were the referents for the analyses.

Overview
The following five baseline adolescent characteristics were included: gender, age, race or ethnicity, sexual orientation, and sexual experience.Gender was dichotomized as female (0) and male (1), and age was treated as a continuous variable.Participants were encouraged to choose all racial or ethnic backgrounds that applied to them (American Indian or Alaska Native, Asian, Black of African American, Native Hawaiian or other Pacific Islander, White, and Other) and asked separately if they identify as Latino or Hispanic.Race or ethnicity was dichotomized, with White non-Hispanic coded as 0 and any affirmative racial or ethnic minority coded as 1.The measure of sexual identity followed best practice for assessing sexual orientation [55] as a composite of several responses, as follows: how they identify (heterosexual or straight, gay or lesbian, bisexual, or other), to whom they are attracted (only females, mostly females, equally males and females, mostly males, or only males), and with whom they have had sexual contact (males only, females only, both, or neither) [56].Using their reported gender identity, participants were considered sexual minorities if they (1) chose a nonheterosexual self-identification, (2) reported any same-sex sexual contact, or (3) reported any XSL • FO RenderX attraction to the same sex.This was recoded into one final item indicating heterosexual (357/411, 74.9%; coded as 0) and sexual (79/411, 19.2%; coded as 1) minorities.Finally, adolescents' responses to the question "Have you ever had sex (vaginal, oral, or anal)?" was coded such that negative responses were 0 and affirmative responses were 1.

Selection Model
As parents and adolescents could choose how far to continue with the program, selection bias may have confounded the dosage analyses.One approach to help account for such biases is to model the selection process and then include an instrumental variable representing it as a predictor in the primary analyses [57].In this case, we conducted a probit analysis to predict the completion of the relationships component from relevant baseline measures and calculated an inverse Mills ratio (IMR) for each respondent based on the probit model.The IMR (nonselection hazard) was calculated in Stata version 15 (StataCorp LLC) using the two-step procedure described by Heckman [57].This ratio is a function of the predicted probability (propensity) of completing the component and represents the underlying selection process.Given the focus of the relationships component, the baseline predictors included measures of parents' and adolescents' evaluations of and levels of communication in their relationship, parent-adolescent trust, parental monitoring, sexual communication, and demographics.Overall communication, adolescents' reports of ever having sex, gender, sexual orientation, and age were included in the selection models.Parents' self-reports of gender, income, and ethnicity were also used.When the IMR is significant in a model, this indicates that the predicted probability of completing the component is associated with the outcome, that is, the same factors that predispose families to complete (or not complete) the components are related to the outcomes.In models where program exposure is significant, this indicates that even accounting for factors that predict program completion, participation in the intervention is still related to outcomes.Selection models provide several benefits, including ease of use and wide use in research (a 700% increase in use over the last decade [58,59]).Selection models also address the selection of unobservable factors, whereas alternatives such as propensity score matching require self-selection of participants to be explained completely by observable factors [59].

Analyses
Examining alternative models, such as dosage models, has been proposed for trials with limited control over program exposure and where substantial portions of participants do not appear motivated to fully adhere to the intervention implementation protocol [60].Participants may lack motivation to complete prevention programs because the illnesses or discomforts have not yet occurred [60,61] in comparison with treatment trials that typically aim to improve an existing problem or condition (eg, alcoholism or diabetes).High rates of nonadherence in prevention trials could introduce type II errors by underestimating the effectiveness of the intervention [60].For these reasons, we examined outcomes for experimental participants based on the level of program exposure, testing the hypothesis that some program exposure, more so relationships component exposure, will be related to increased sexual communication.
Outcomes were assessed using generalized estimating equations in SPSS (version 25) to account for repeated measures of each outcome (inclusive of baseline report) nested within participants.In each analysis, variables included adolescent gender, age, ethnicity, sexual minority status, report of sexual experience at baseline, measurement period, the IMR, and the two dichotomous variables for exposure to the intervention (one or two components: communications and alcohol only; all three components: communications, alcohol, and relationships component), such that those with no exposure comprised the referent group.The analysis of hypothesis 1 included only tests of the main effects of the variables.The analysis of hypothesis 2 added an interaction term for gender based on exposure to the intervention.

Changes Over Four Survey Waves (Baseline Through 18-Month Follow-up)
For all adolescents regardless of randomization or program exposure, there was a significant main effect of time on most communication outcomes, with most reports by adolescents decreasing over time (data not shown).There were significant decreases over time for overall frequency of communication, average frequency of specific topics, and number of topics discussed.There were also significant decreases in conversations regarding specific topics, including delaying sex, health risks, and dating rules.In contrast, there was a significant increase in conversations reflecting sex permissiveness at 12 months and again at 18 months.Discussions related to parental provision of birth control showed no main effects across time.

Adolescent Characteristics
Gender had a significant effect on most sexual communication outcomes.Adolescent girls reported greater sexual communication with parents regarding overall frequency, average topic frequency, and number of topics and were more likely to report communicating with parents about delaying sex.They were also more likely to report a greater number of dating rules.Boys were more likely than girls to report communication indicating that parents would provide birth control.There were no differences between genders regarding communication about sex permissiveness or health risks.
Previous sexual experience at baseline had a significant main effect on reported sexual communication with parents.Adolescents who reported previous sexual experience also had greater reports of overall frequency, average frequency, and number of topics discussed with parents.Adolescents with previous sexual experiences also reported greater sex permissiveness, health risk communication, and fewer reports of birth control provision, delaying sex, and dating rules.
Adolescents' sexual minority status also had significant main effects, with those whose sexual orientation was not strictly heterosexual, reporting more sexual permissive communications with parents.They also reported a lower average frequency of communication, less discussion about delaying sex, and fewer dating rules.A few differences were found between White and racial or ethnic minority adolescents with White adolescents reporting greater average frequency and more discussions on delaying sex.

Hypothesis 1: Main Effects of Relationships Component
Significant main effects were found for participating in the intervention after controlling for gender, racial or ethnic status, age at baseline, sexual minority status, sexual experience, the IMR, and time in the model (Tables 2-4).As hypothesized, adolescents engaged in the relationships component reported higher levels of overall frequency of sexual communication with their parents (B=0.30;SE 0.11; 95% CI 0.08-0.52;P=.007) than those with no exposure and those who participated in only the communication or alcohol component.Adolescents exposed to the relationships component reported significantly higher average topic frequency (B=0.27;SE 0.12; 95% CI 0.03-0.51;P=.03) and a greater number of dating rules (B=0.72;SE 0.37; 95% CI 0-1.44;P=.049).There were no main effects on other communication outcomes.As noted earlier, those who were exposed to only the communications and alcohol components were considered separately from those who were exposed to the relationships component.Exposure to only the communications or alcohol components was significantly associated with lower average topic frequency (B=−0.24;SE 0.12; 95% CI −0.47 to −0.01; P=.04).

Hypothesis 2: Interaction Effects of the Intervention by Gender
To assess the impact of exposure to the relationships component by gender, a series of analyses was conducted with interaction terms (Tables 5-7).The findings suggest that the impact of the intervention was stronger for girls than boys for overall frequency of sexual communication (B=−0.41;SE 0.21; 95% CI −0.81 to −0.01; P=.046).However, the significant main effect of the intervention did not vary by gender for average frequency of specified sexual topics (relationships component: P=.01; relationships component by gender: P=.12) or for dating rules (relationships component: P=.01; relationships component by gender: P=.32).

Principal Findings
The data support the efficacy of the Smart Choices 4 Teens intervention in increasing adolescent and parent communications about sexual relationships (eg, frequency) and increasing parental guidance (eg, dating rules).There was some support for our first hypothesis, in that the intervention had a main effect on frequency of communication and dating rules set for the adolescents, even after controlling for other adolescent characteristics that were also significant predictors of adolescents' reports of sexual communication with their parents, including developmental changes over time, as well as adolescent gender, sexual minority status, and sexual experience.
There was some evidence to suggest that the intervention impacts parent-adolescent communication based on the gender of the adolescent.In general, girls are more likely than boys to report more frequent parent-adolescent conversations, and there was some evidence that the intervention had a greater long-term impact on increasing conversations about delaying sex with girls.One possible explanation may be that parents either consciously or unconsciously consider adolescent girls to be more responsible for sexual decision making than boys.Another possible explanation is that mothers are engaged in more conversations with adolescents than fathers; parent-adolescent communication about sexual activity may be more comfortable when conducted with same-sex combinations.
However, there were more indications that the intervention had some impact on sexual communication over time, irrespective of the gender of the adolescent.When accounting for the possible interaction between the time of administration, gender of the adolescent, and exposure to the relationships component, the effect of the relationships component over time (and not by gender) was more often the one that demonstrated an impact on the communication outcome.Throughout the literature on adolescent sexuality, although many sexual outcomes and measures of sexual communication often vary by gender, we found that this intervention had an impact on adolescents regardless of their gender.The intervention increased the number of sexual communication reports from both boys and girls, even in terms of dating rules, which also contained items that indicated the greater parental monitoring of adolescent relationships.There was no indication of an interaction effect between gender and intervention exposure on dating rules.Previous research indicates that girls (and parents of girls) tend to report greater relationship monitoring, as indicated by a higher number of dating rules.However, participating in the intervention increased the dating rules for all participants and was durable across time.
Findings from the study are limited by the overall number of families that engaged in the relationship component and the ability of the probit model to capture their most salient features [62].The number of families completing the program also limited the ability to test differences in outcomes for adolescents who represent sexual and ethnic minorities.Replication studies that allow a more extensive examination of program effects are needed.Given that significant results were found with a reduced number of families, future replication studies that address engagement may find more robust support for the program.Forcing families to complete the two other components before accessing the relationships component contributed to the reduced completion rate for families in this component.Additional trials are needed to replicate these findings, and these efforts need to address engagement efforts that may help sustain families in completing the intervention.Future studies may also allow families to choose the order of completing the components.Engaging families in prevention programs requires overcoming XSL • FO RenderX the perception of many parents that their children do not need prevention programs because they have not observed any problems in the targeted areas.
Developing a universal prevention program for families that addresses adolescent relationships requires balancing the divergent views and needs of families.By allowing adolescents and parents to separately negotiate the program, this program allowed some self-determination in covering the materials and the amount of time they spent on the various elements of the program.Providing families with four different discussion scenarios and guiding questions meant that families had some element of choice in deciding what was most relevant to their family.Future replications of this program could enhance these discussion topics to address current issues that emerge in the community (eg, emerging challenges regarding casual sexual hook-ups for adolescents to negotiate).Future replications could also embed updated factual information into existing program elements (eg, state-specific rates and types of sexually transmitted infections for adolescents).Finally, the sexual and gender diversity of the adolescents were not examined in depth to further disentangle the impact of the program on specific adolescents.Gender was measured as a binary construct, which has decreasing relevance over time, as many adolescents have chosen to identify ways that defy such rigid definitions.Future implementation and assessment of this intervention will ensure that nonbinary gender identification choices are permitted.Although the measure of sexual diversity was inclusive, the sample size and space limitations did not permit more detailed analyses to understand nuance beyond strictly heterosexual or not.
Beyond the ability to adapt a web-based program for families, other advantages for building on an existing web-based intervention are that the costs for web-based delivery are relatively small and the reach is potentially large.Engaging families and making web-based programs accessible are important issues to be addressed in future research.Such programs can complement existing program efforts in schools and health care settings.

Conclusions
The Smart Choices 4 Teens intervention was designed to be sensitive to the transition to young adulthood and increased independent decision-making.The intervention addresses critical needs for families of older adolescents, including the perspectives of adolescents and parents, leveraging the continued influence of parents even later in adolescence, and permitting flexibility to the schedules of families.Most importantly, this intervention shows promise for long-term impact on increasing parent-adolescent sexual communication, potentially providing some skills and capacity to handle the relationship demands of older adolescents.

Figure 1 .
Figure 1.Consolidated Standards of Reporting Trials flow diagram.

Figure 2 .
Figure 2. Gender by exposure over time (mean scores).

Table 1 .
Intervention dosage and survey completion (N=411).Not available; those in the control group were not permitted to participate in the intervention and thus have no exposure data. a