Table 1 Characteristics of mother and offspring in the cohorts
| Â | Cohorts of Shanghai key laboratory | ||
|---|---|---|---|
Overall (N = 2211) | SBC (N = 1957) | SSBC (N = 254) | |
Mean ± SD/n (%) | Mean ± SD/n (%) | Mean ± SD/n (%) | |
Mother | |||
Age at delivery (years) | 28.54 ± 3.54 | 28.42 ± 3.57 | 29.47 ± 3.16 |
Education level | |||
 High school or below | 182 (8.2) | 159 (8.1) | 23 (9.1) |
 College or above | 2029 (91.8) | 1798 (91.9) | 231 (90.9) |
Pre-pregnancy BMI (kg/m2) | |||
 < 18.5 | 360 (16.3) | 312 (15.9) | 48 (18.9) |
 18.5–25 | 1625 (73.5) | 1465 (74.9) | 160 (63.0) |
 ≥ 25 | 226 (10.2) | 180 (9.2) | 46 (18.1) |
Gestational weight gain | |||
 Inadequate | 394 (17.8) | 368 (18.8) | 26 (10.2) |
 Adequate | 875 (39.6) | 763 (39.0) | 112 (44.1) |
 Excessive | 942 (42.6) | 826 (42.2) | 116 (45.7) |
Nighttime sleep duration (h) | 9.24 ± 1.13 | 9.22 ± 1.12 | 9.44 ± 1.16 |
Sleep quality | |||
 Good | 1668 (75.5) | 1494 (76.4) | 174 (68.8) |
 Poor | 541 (24.5) | 462 (23.6) | 79 (31.2) |
Sleep midpoint | 3.02 ± 0.82 | 3.00 ± 0.82 | 3.21 ± 0.80 |
Offspring | |||
Sex | |||
 Boy | 1137 (51.4) | 1007 (51.5) | 130 (51.2) |
 Girl | 1074 (48.6) | 950 (48.5) | 124 (48.8) |
BMI at 24 months (kg/m2) | 16.52 ± 1.39 | 16.57 ± 1.39 | 16.03 ± 1.32 |
SF at 24 months (mm) | 21.27 ± 4.17 | 20.40 ± 3.06 | 27.27 ± 5.63 |