Statistical and Economic Analysis

How it works

Evidence quality

Highlighted claims

• A linear mixed-effects model will assess the intervention effect on SDQ total score across three time points. — Study protocol of the e-Intervention Enhancing Mental Health in Adolescents (IMPROVA) project: a randomised controlled trial to promote adolescents’ mental health and well-being in four European countries
• The main intervention parameter is the group by time interaction term. — Study protocol of the e-Intervention Enhancing Mental Health in Adolescents (IMPROVA) project: a randomised controlled trial to promote adolescents’ mental health and well-being in four European countries
• Analyses follow the intention-to-treat principle, with complete-case analysis used as sensitivity analysis. — Study protocol of the e-Intervention Enhancing Mental Health in Adolescents (IMPROVA) project: a randomised controlled trial to promote adolescents’ mental health and well-being in four European countries
• Cost-effectiveness analysis will estimate incremental cost-effectiveness ratios using KIDSCREEN-10 as the primary utility measure. — Study protocol of the e-Intervention Enhancing Mental Health in Adolescents (IMPROVA) project: a randomised controlled trial to promote adolescents’ mental health and well-being in four European countries
• Effect modification analyses will test variation by sex, age, country, socioeconomic status, school type, and baseline mental health status. — Study protocol of the e-Intervention Enhancing Mental Health in Adolescents (IMPROVA) project: a randomised controlled trial to promote adolescents’ mental health and well-being in four European countries
• SROI analysis will convert social, environmental, and economic outcomes into monetary terms to produce a benefit-to-cost ratio. — Study protocol of the e-Intervention Enhancing Mental Health in Adolescents (IMPROVA) project: a randomised controlled trial to promote adolescents’ mental health and well-being in four European countries