Characteristics | Neonates (n=538) | 1–9-year-old children (n=2475) | Total (n=3013) |
---|---|---|---|
Age at baseline (years) | |||
Median (IQR) | - | 4 (2-6) | 3 (1–6) |
0 | 538 (100) | - | 538 (18) |
1 | - | 355 (14) | 355 (12) |
2 | - | 368 (15) | 368 (12) |
3 | - | 332 (13) | 332 (11) |
4 | - | 333 (13) | 333 (11) |
5 | - | 330 (13) | 330 (11) |
6 | - | 283 (11) | 283 (9) |
7 | - | 205 (8) | 205 (7) |
8 | - | 162 (7) | 162 (5) |
9 | - | 107 (4) | 107 (4) |
Male | 286 (53) | 1246 (50) | 1532 (51) |
Has twin siblingsa | 12 (2%) | - | 12 |
Gestational age at birth (weeks) | |||
Median (IQR) | 40 (39-41) | - | - |
<37 | 10 (2) | 105 (4) | 115 (4) |
37–42 | 508 (94) | 2344 (95) | 2852 (95) |
>42 | 20 (4) | 25 (1) | 45 (1) |
Delivery mode | |||
Transvaginal delivery | 331 (62) | 1577 (64) | 1908 (63) |
Caesarean | 207 (38) | 897 (36) | 1104 (37) |
Birthweight (g) | |||
Median (IQR) | 3300 (3000–3600) | 3250 (3000–3500) | 3250 (3000–3500) |
<2500 | 11 (2) | 88 (4) | 99 (3) |
2500–<4000 | 491 (91) | 2139 (86) | 2630 (87) |
≥4000 | 36 (7) | 247 (10) | 283 (9) |
Annual family income (RMB, Yuan) | |||
<20,000 | 82 (15) | 611 (25) | 693 (23) |
20,000–<50,000 | 297 (55) | 1382 (56) | 1679 (56) |
≥50,000 | 158 (29) | 482 (19) | 640 (21) |