Figure 1.

Correlation matrix of the investigated variables stratified by sex for overview (using Spearman’s rank correlation coefficient). Nutrition awareness and daily smoking were encoded as 1 for “yes” and 0 for “no”. Alcohol consumption had five levels: 5 = daily, 4 = weekly, 3 = weekends, 4 = monthly, 1 = less than monthly. School curriculum was encoded as 1 for SCS and 0 for OCS, while physical activity was encoded using WHO guidelines as 1 for ≥300 min per week (PAS) and 0 for <300 min per week (PIS). * p < 0.05.