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. 2019 Apr 15;11(4):854. doi: 10.3390/nu11040854

Table 1.

Description of the main characteristics of the sample of primary and secondary school groups according to sex 1.

Primary Secondary
Total
(n = 668)
Male
(n = 310)
Female
(n = 358)
Total
(n = 509)
Male
(n = 246)
Female
(n = 263)
Mean ± SD Mean ± SD Mean ± SD Mean ± SD Mean ± SD Mean ± SD
Age 8.7 ± 1.7 8.7 ± 1.7 8.6 ± 1.67 14.9 ± 1.9 15.0 ± 1.9 14.9 ± 1.8
Weight (kg) 31.8 ± 9.2 31.8 ± 9.0 31.8 ± 9.5 56.3 ± 12.5 59.1 ± 14.3 * 53.7 ± 9.9 *
Height (m) 1.32 ± 0.11 1.33 ± 0.11 1.31 ± 0.11 1.63 ± 0.09 1.67 ± 0.10 * 1.59 ± 0.07 *
BMI (kg/m2) 17.7 ± 2.9 17.6 ± 2.7 17.9 ± 3.1 20.9 ± 3.3 20.9 ± 3.5 20.9 ± 3.1
Adequate hours of sleep (%) 62.0 63.0 61.0 62.0 66.0 59.0
Mother completed higher education (%) 27.0 † 29.0 † 26.0 20.0 † 21.0 † 19.0
Father completed higher education (%) 23.0 26.0 20.0 21.0 21.0 21.0
Mother born outside Catalonia (%) 25.0 † 26.0 † 25.0 † 39.0 † 42.0 † 37.0 †
Low FAS (%) 4.7 4.5 4.8 2.8 2.0 3.4
Medium FAS (%) 64.1† 67.8 † 60.9 † 43.0 † 41.1† 44.9 †
High FAS (%) 31.2 † 27.7 † 34.3 † 54.2 † 56.9 † 51.7 †

1 For each variable, the groups with the same superscript present statistically significant differences (p-value < 0.05). BMI: body mass index; FAS: Family Affluence Scale. * Differences between sexes in each school group; † differences between school groups: total, male, and female.