Web-Based Alcohol, Smoking, and Substance Involvement Screening Test Results for the General Spanish Population: Cross-Sectional Study

Juan A Lopez-Rodriguez   ^{1, 2, 3, 4 *} , MD, PhD ;   Gabriel Rubio Valladolid   ^{5, 6, 7, 8 *} , MD, PhD

¹ Primary Care Research Unit, Gerencia Asistencial de Atención Primaria, Servicio Madrileño de Salud, Madrid, Spain

² General Ricardos Primary Health Care Centre, Madrid, Spain

³ School of Health Sciences, King Juan Carlos University, Alcorcón, Madrid, Spain

⁴ Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Carlos III Health Institute, Madrid, Spain

⁵ School of Medicine, Complutense University of Madrid, Madrid, Spain

⁶ Department of Psychiatry, 12 Octubre University Hospital, Madrid, Spain

⁷ Area 8, Neurociencias y Salud Mental, Madrid, Spain

⁸ Red de Trastornos Adictivos (RTA), Carlos III Health Institute, Madrid, Spain

*all authors contributed equally