Variables | All (N = 1765) | Boys (n = 918) | Girls (n = 847) | P * |
---|---|---|---|---|
Study centre, n (%) | ||||
Poitiers | 866(49.07) | 490(53.38) | 376(44.39) | <0.01 |
Nancy | 899(50.93) | 428(46.62) | 471(55.61) | |
Family income (€/month), n (%) | ||||
Low(≤1500) | 262(14.84) | 140(15.25) | 122(14.40) | 0.15 |
Middle(1501–3000) | 1001(56.71) | 534(58.17) | 467(55.14) | |
High( >3001) | 492(27.88) | 237(25.82) | 255(30.11) | |
Maternal education attainment, n (%) | ||||
Less than high school | 104(5.89) | 55(5.99) | 49(5.79) | 0.97 |
High school | 683(38.70) | 352(38.34) | 331(39.08) | |
College/University or more | 950(53.82) | 492(53.59) | 458(54.07) | |
Maternal occupation, n (%) | ||||
Blue-collar (laborers) | 81(4.59) | 49(5.34) | 32(3.78) | 0.24 |
White-collar (occupations of intermediate, administrative, sales and customers and personal services) | 1339(75.86) | 688(74.95) | 651(76.86) | |
Professional (professional occupations, managers and senior officials) | 217(12.29) | 108(11.76) | 109(12.87) | |
Maternal age at recruitment (years), (Mean ± SD † ) | 30.64 ± 4.81 | 30.70 ± 4.81 | 30.58 ± 4.81 | 0.61 |
Maternal pre-pregnancy body mass index, n (%) | ||||
Underweight (<18.50 kg/m2) | 136(7.71) | 74(8.06) | 62(7.32) | 0.80 |
Normal (18.50-24.99 kg/m2) | 1139(64.53) | 597(65.03) | 542(63.99) | |
Overweight (25.00-29.99 kg/m2) | 305(17.28) | 156(16.99) | 149(17.59) | |
Obese (≥30.00 kg/m2) | 149(8.44) | 73(7.95) | 76(8.97) | |
Cesarean delivery, n (%) | 278(15.75) | 162(17.65) | 116(13.70) | 0.02 |
Preterm birth ‡ , n (%) | 428(24.25) | 231(25.16) | 197(23.26) | 0.35 |
Birth weight (grams), (Mean ± SD) | 3285.56 ± 506.65 | 3350.52 ± 529.41 | 3214.89 ± 470.89 | <0.01 |
Breastfeeding, n (%) | ||||
Never | 795(45.04) | 436(47.49) | 359(42.38) | 0.07 |
≤ 4 months | 550(31.16) | 279(30.39) | 271(32.00) | |
> 4 months | 420(23.80) | 203(22.11) | 217(25.62) | |
Siblings, n (%) | 962(54.50) | 505(55.01) | 457(53.96) | 0.68 |
Family history of asthma, eczema, allergic rhinitis or food allergy, n (%) | 912(51.67) | 484(52.72) | 428(50.53) | 0.33 |