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Agreement Between Apple Watch and Actical Step Counts in a Community Setting: Cross-Sectional Investigation From the Framingham Heart Study

Agreement Between Apple Watch and Actical Step Counts in a Community Setting: Cross-Sectional Investigation From the Framingham Heart Study

Sections separated by the dashed lines include the following number of person-days divided by participants: A=17/5, B=205/68, C=2963/512, D=3/2, E=4/4, and F=31/29. The Bland-Altman plots on the right show the mean difference or mean % difference (red dashed line) and the limits of agreement 95% CI (blue dashed lines). The mean % difference was calculated as 100 multiplied by (Apple Watch steps minus Actical steps) divided by (average Apple Watch and Actical steps).

Nicole L Spartano, Yuankai Zhang, Chunyu Liu, Ariel Chernofsky, Honghuang Lin, Ludovic Trinquart, Belinda Borrelli, Chathurangi H Pathiravasan, Vik Kheterpal, Christopher Nowak, Ramachandran S Vasan, Emelia J Benjamin, David D McManus, Joanne M Murabito

JMIR Biomed Eng 2024;9:e54631

Association of Depressive Symptom Trajectory With Physical Activity Collected by mHealth Devices in the Electronic Framingham Heart Study: Cohort Study

Association of Depressive Symptom Trajectory With Physical Activity Collected by mHealth Devices in the Electronic Framingham Heart Study: Cohort Study

Trained technicians administered the 20-item Center for Epidemiological Studies-Depression (CES-D) scale at each of the 3 research exams. The CES-D scale assesses how often individuals experienced depressive symptoms over the past week, with the total score ranging from 0 to 60. Each item has a score that ranges from 0 to 3 [17]. In 16 of the 20 CES-D questions, a higher score corresponds to a higher frequency of depressive symptoms.

Xuzhi Wang, Chathurangi H Pathiravasan, Yuankai Zhang, Ludovic Trinquart, Belinda Borrelli, Nicole L Spartano, Honghuang Lin, Christopher Nowak, Vik Kheterpal, Emelia J Benjamin, David D McManus, Joanne M Murabito, Chunyu Liu

JMIR Ment Health 2023;10:e44529