Table 1.
Characteristics of the sample according to educational level and sex.
| Variables | Third Grade | Sixth Grade | Total Sample | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Females (n = 65) |
Males (n = 73) |
Total (n = 138) |
Females (n = 86) |
Males (n = 85) |
Total (n = 171) |
Females (n = 151) |
Males (n = 158) |
Total (n = 309) |
|
| Child characteristics | |||||||||
| Age (years), mean (SD) | 8.3 (0.5) | 8.3 (0.5) | 8.3 (0.5) | 11.4 (0.6) | 11.5 (0.6) | 11.4 (0.6) | 10.1 (1.7) | 10.0 (1.7) | 10 (1.7) |
| Weight (kg), mean (SD) | 32.2 (8.4) | 32.7 (6.3) | 32.4 (7.3) | 45.3 (10.7) | 45.6 (12.0) | 45.5 (11.3) | 39.6 (11.7) | 39.6 (11.7) | 39.6 (11.7) |
| Height (cm), mean (SD) | 133.9 (6.4) | 135.7 (6.4) | 134.8 (6.4) | 150.1 (8.7) | 149.8 (9.6) | 149.9 (9.1) | 143 (11.2) | 143.2 (10.9) | 143.1 (11) |
| BMI (kg/m2), mean (SD) | 17.8 (3.6) | 17.7 (2.7) | 17.7 (3.1) | 20.1 (4.0) | 20.1 (3.5) | 20.1 (3.7) | 19.1 (4.0) | 19.0 (3.4) | 19 (3.7) |
| BMI Categories, n (%) 1 | |||||||||
| Underweight | 6 (9.2) | 5 (6.9) | 11 (8.0) | 10 (11.8) | 4 (4.8) | 14 (8.3) | 16 (10.7) | 9 (5.7) | 25 (8.1) |
| Normal-weight | 41 (63.1) | 49 (67.1) | 90 (65.2) | 49 (57.7) | 51 (60.7) | 100 (59.2) | 90 (60.0) | 100 (63.7) | 190 (61.9) |
| Overweight | 12 (18.5) | 14 (19.2) | 26 (18.8) | 21 (24.7) | 24 (28.6) | 45 (26.6) | 33 (22.0) | 38 (24.2) | 71 (23.1) |
| Obesity | 6 (9.2) | 5 (6.9) | 11 (8.0) | 5 (5.9) | 5 (6.0) | 10 (5.9) | 11 (7.3) | 10 (6.4) | 21 (6.8) |
| Parents characteristic | |||||||||
| Maternal age (years), mean (SD) | 39.6 (5.0) | 40.8 (5.2) | 40.2 (5.1) | 42.6 (5.0) | 42.9 (5.2) | 42.7 (5.1) | 41.3 (5.2) | 41.9 (5.3) | 41.6 (5.3) |
| Paternal age (years), mean (SD) | 42.6 (5.1) | 43 (5.1) | 42.8 (5.1) | 45.1 (5.3) | 45.4 (5.5) | 45.3 (5.4) | 44.0 (5.3) | 44.3 (5.4) | 44.2 (5.4) |
| Maternal education, n (%) 1 | |||||||||
| Primary | 8 (18.2) | 7 (13.7) | 15 (15.8) | 14 (17.5) | 14 (20.0) | 28 (18.7) | 22 (17.7) | 21 (17.4) | 43 (17.6) |
| Secondary/University | 36 (81.8) | 44 (86.3) | 80 (84.2) | 66 (82.5) | 56 (80.0) | 122 (81.3) | 102 (82.3) | 100 (82.6) | 202 (82.4) |
| Paternal education, n (%) 1 | |||||||||
| Primary | 8 (19.1) | 11 (21.6) | 19 (20.4) | 18 (23.7) | 15 (21.4) | 33 (22.6) | 26 (22.0) | 26 (21.5) | 52 (21.8) |
| Secondary/University | 34 (81.0) | 40 (78.4) | 74 (79.6) | 58 (76.3) | 55 (78.6) | 113 (77.4) | 92 (78.0) | 95 (78.5) | 187 (78.2) |
| Lifestyle behaviors | |||||||||
| Exercise practice outside school (days/week), mean (SD) | 3.5 (1.9) | 4.1 (1.7) | 3.8 (1.8) | 3.5 (1.8) | 4.2 (2) | 3.8 (1.9) | 3.5 (1.8) | 4.1 (1.8) | 3.8 (1.9) |
| Attendance at the school canteen (days/week), mean (SD) | 2.6 (2.4) | 2.3 (2.4) | 2.4 (2.4) | 1.4 (2.2) | 1.6 (2.2) | 1.5 (2.2) | 1.9 (2.3) | 1.9 (2.3) | 1.9 (2.3) |
| Sleeping habits (h/weekday), mean (SD) | 9.9 (0.9) | 9.8 (0.9) | 9.8 (0.9) | 9.3 (0.9) | 9.3 (1.0) | 9.3 (1.0) | 9.5 (1.0) | 9.5 (1.0) | 9.5 (1.0) |
BMI: body mass index. SD: standard deviation. 1 Differences in totals are due to missing values.