Table 2.
Measured variables in the Fortaleça sua Saúde program
| Dimension | Variables (reliability)b | |
|---|---|---|
| Primary Variablesa | ||
| PA | √ Weekly volume in moderate to vigorous PA and PA levels (ICC = 0.71) | |
| √ PA-related behavior change (ICC = 0.76) | ||
| √ Preference for PA in leisure-time (ICC = 0.75) | ||
| √ Active commuting (walking/cycling) to school (ICC = 0.89) | ||
| Potential PA mediators | √ Intrapersonal: Attitudes, self-efficacy and expectations (risks/benefits) (α range = 0.77–0.81) | |
| √ Interpersonal: family, friend and teacher support (α range = 0.84–0.90) | ||
| √ Environmental: Neighborhood and school perception (α range = 0.61–0.78) | ||
| Screen time | √ Daily time watching TV on weekdays and weekends days (ICC = 0.72 and 0.56) | |
| √ Daily time using computer/video games on weekdays and weekends days (ICC = 0.80 and 0.75) | ||
| √ Reducing TV watching-related behavior change stage (ICC = 0.80) | ||
| √ Reducing computer/videogames using-related behavior change stage (ICC = 0.78) | ||
| Potential reducing screen time mediators | √ Intrapersonal: attitude, self-efficacy and expectations (risks/benefits) (α range = 0.64–0.85) | |
| √ Interpersonal: family modelling, support and norms (α range = 0.56–0.78) | ||
| √ Environmental: family and school environment, house and bedroom characteristics (α range = 0.73–0.85) | ||
| Secondary variablesa | √ Body mass index | √ Self-rated health (ICC = 0.90) |
| √ Waist circumference | √ Stress perception (ICC = 0.79) | |
| √ Eating habits (ICC range = 0.71-0.89) | √ Body image (ICC = 0.85) | |
| √ Alcohol use (ICC = 0.71) | √ Sleep quality and duration (ICC range = 0.59-0.75) | |
| √ Tobacco use (ICC = 0.99) | √ Sleepiness (α = 0.62) | |
| √ Condom use (ICC = 0.98) | √ Academic performance | |
| √ Quality of life (ICC = 0.78) | √ School attendance | |
| Descriptive variablesa | √ Age (ICC = 0.99) | √ Mother’s schooling (ICC = 0.92) |
| √ Gender (Kappa = 1.00) | √ Student’s occupational status (Kappa = 0.90) | |
| √ Father’s schooling (ICC = 0.86) | √ Family’s economy class (ICC = 0.93) | |
| Subsample (obese) Variablesa | √ Depressive symptoms (α = 0.90) | √ Objectively-measured PA |
| √ Eating disorders (α = 0.80) | √ Objectively-measured sedentary time | |
| √ Sleep quality (α = 0.83) | ||
| Evaluation variables | √ Interest of the school community for the program proposal (before baseline) | |
| √ Visibility of the program during implementation (during the program) | ||
| √ Execution process of the strategies (during the program) | ||
| √ Interest in keeping the strategies in the future (immediately after the end of the program) | ||
| √ Maintenance of the program strategies (six months after the end of the program) | ||
| √ Start-up and operational costs (economic evaluation) | ||
PA Physical activity
aAll these variables will be measured at baseline and immediately after the intervention
bReliability of the self-reported measures were evaluated using Kappa’s index for dichotomous variables (e.g., gender), intra-class correlation coefficient for ordinal variables (e.g., economic class) and Cronbach’s alpha for scales (e.g., attitude scales). This measures were obtained using a sample (n = 194) of students who were not enrolled in the Fortaleça sua Saúde program