# Table 2 Descriptive statistics and statistical tests results for sociodemographic characteristics of children attending primary and secondary schools

Variables Total N(%) Primary schoolchildren N(%) Secondary schoolchildren N (%) p value
Gender
Girl 9489 (50.40) 6621 (50.50) 2868 (51.00) 0.65*
Boy 9332 (49.60) 6483 (49.50) 2849 (49.00)
Participation in OPA
Yes 10,519(57.60) 8171(62.3) 2348(44.60) < 0.001*
No 7747(42.40) 4948 (37.7) 2799(55.40)
BMI
Underweight 427 (2.50) 57(0.50) 370(7.40) < 0.001**
Normal weight 10,660(62.90) 7607(63.40) 3053(61.00)
Overweight 4296 (25.30) 3057(25.80) 1235(24.00)
Obese 1573 (9.30) 1229(10.40) 339(6.60)
Father’s participation in OPA
Yes 8821(48.30) 6628(50.50) 2193(42.60) < 0.001*
No 9443(51.90) 6491(49.50) 2952(57.40)
Μother’s participation in OPA
Yes 9957(56.30) 7038(53.60) 1646(32.00) 0.03*
No 7727(43.70) 6081 (46.40) 2919(56.70)
Geographic Area
Rural 5510 (30.20) 4267 (32.50) 1243 (24.10) 0.20**
Semi Urban 4797 (26.20) 3843(29.30) 954(18.50)
Urban 7957 (43.60) 5009(38.20) 2948(57.40)
1. *The Chi-square test was used to calculate the p-value
2. **The Mann-Whitney test was used to calculate the p-value