Mothers ≤ 39 n = 71,472 | Mothers 40–45 n = 35,429 | Mothers ≥ 45 n = 2229 | CHI-SQUARE/ANOVA | |||||||
---|---|---|---|---|---|---|---|---|---|---|
mean/SD | mean/SD | mean/SD | p-value1 | p-value2 | p-value3 | p-value4 | ||||
Child’s length, cm (mean/SD) | 50.34/ 2.65 | 50.27/ 2.85 | 49.85/ 3.30 | < 0.001b | < 0.001b | < 0.001b | < 0.001b | |||
Child’s weight, gram (mean/SD) | 3541.49/ 604.21 | 3507.06/ 639.68 | 3403.80/ 706.41 | < 0.001b | < 0.001b | < 0.001b | < 0.001b | |||
n | % | n | % | n | % | p-value1 | p-value2 | p-value3 | p-value4 | |
Twin | < 0.001 | 0.007 | < 0.001 | < 0.001 | ||||||
No | 68,452 | 95.8 | 34,056 | 96.1 | 2033 | 91.2 | ||||
Yes | 3020 | 4.2 | 1373 | 3.9 | 196 | 8.8 | ||||
Gestational age | < 0.001 | < 0.001 | < 0.001 | < 0.001 | ||||||
Very preterm, < 32 weeks | 680 | 1.0 | 436 | 1.2 | 54 | 2.4 | ||||
Preterm, 32–36 weeks | 3870 | 5.4 | 2156 | 6.1 | 187 | 8.4 | ||||
Post term, > 42 weeks | 245 | 0.3 | 127 | 0.4 | 8 | 0.4 | ||||
Birthweight | < 0.001 | < 0.001 | < 0.001 | < 0.001 | ||||||
Low birthweight, 1500 g-2499 g | 2633 | 3.7 | 1558 | 4.4 | 153 | 6.9 | ||||
Very low birthweight, < 1500 g | 534 | 0.7 | 405 | 1.1 | 48 | 2.2 | ||||
Size for gestational age | < 0.001 | < 0.001 | < 0.001 | 0.884 | ||||||
AGA5 | 67,107 | 93.9 | 32,710 | 92.3 | 2052 | 92.1 | ||||
SGA6 | 1281 | 1.8 | 987 | 2.8 | 63 | 2.8 | ||||
LGA7 | 3084 | 4.3 | 1732 | 4.9 | 114 | 5.1 | ||||
Apgar 5 | < 0.001 | < 0.001 | < 0.001 | 0.168 | ||||||
Low score, 0–6 | 763 | 1.1 | 546 | 1.6 | 43 | 1.9 | ||||
Apgar 10 | < 0.001 | < 0.001 | < 0.001 | 0.015 | ||||||
Low score0–6 | 253 | 0.4 | 181 | 0.5 | 20 | 0.9 | ||||
Child healthc | < 0.001 | < 0.001 | < 0.001 | < 0.001 | ||||||
Healthy – No | 14,282 | 20.4 | 8422 | 24.3 | 602 | 27.7 | ||||
Survival | < 0.001 | < 0.001 | 0.011 | 0.328 | ||||||
0–27 days | 123 | 0.2 | 102 | 0.3 | 9 | 0.4 |