Table 1 The characteristics of study participants of 10,482 women by HBW.
From: Maternal Habitual Midday Napping Duration and Frequency are Associated with High Birthweight
Normal birthweight | High birthweight | |||
|---|---|---|---|---|
n = 9,868 | n = 614 | χ2/F | P | |
Maternal age(year)(mean ± SD) | 28.20 ± 3.66 | 28.49 ± 3.65 | 1.104 | 0.316* |
Education (%) | ||||
More than high school | 1,361(94.3%) | 83(5.7%) | ||
High school | 1,847(94.7%) | 104(5.3%) | 1.392 | 0.499+ |
Less than high school | 6,655(94.0%) | 427(6.0%) | ||
Missing | 5 (100.0%) | |||
Household income (Yuan/per year) (%) | ||||
<50000 ($7350) | 4,096(94.2%) | 252(5.8%) | ||
50000–($7350–) | 3,895(94.3%) | 236(5.7%) | 0.800 | 0.670+ |
≥100000($14700) | 1,714(93.7%) | 115(6.3%) | ||
Missing | 163(93.7%) | 11(6.3%) | ||
Employment during pregnancy (%) | ||||
Employed | 4,630(93.8%) | 305(6.2%) | 1.706 | 0.191+ |
Unemployed | 5,229(94.4%) | 309(5.6%) | ||
Missing | 9(100.0%) | |||
BMI before pregnancy (kg/m2) (%) | ||||
<18.5 | 2,298(97.0%) | 72(3.0%) | ||
18.5– | 6,584(94.2%) | 409(5.8%) | 124.967 | <0.0001+ |
24–28 | 847(89.3%) | 101(10.7%) | ||
≥28 | 139(91.3%) | 32(18.7%) | ||
Passive smoking (%) | ||||
Yes | 8,650(94.0%) | 550(6.0%) | 1.984 | 0.159+ |
No | 1,218(95.0) | 64(5.0%) | ||
Parity (%) | ||||
0 | 8,426(94.1%) | 529(5.9%) | 0.275 | 0.600+ |
≥1 | 1,442(94.4%) | 85(5.6%) | ||
Infant sex (%) | ||||
Boy | 5,117(92.6%) | 406(7.4%) | 47.215 | <0.0001+ |
Girl | 4,751(95.8%) | 208(4.2%) | ||
Gestational age (week)(%) | ||||
<37 | 350(100.0%) | 0(0%) | ||
37– | 9,500(93.9%) | 613(6.1%) | 38.316 | <0.0001# |
≥42 | 18(94.7%) | 1(5.3%) | ||
Physical activity (%) | ||||
Never | 1,065(95.1%) | 55(4.9%) | ||
Not everyday | 1,742(93.2%) | 128(6.8%) | 5.317 | 0.070+ |
Everyday | 6,995(94.3%) | 426(5.7%) | ||
Missing | 66(93.0%) | 5(7.0%) | ||
GDM (%) | ||||
Yes | 770 (89.1%) | 94 (10.9%) | 43.064 | <0.0001+ |
No | 9,098(94.6%) | 520(5.4%) | ||
Night sleep duration (hours) (%) | ||||
<7 | 93(96.9%) | 3(3.1%) | ||
7– | 536(93.7%) | 36(6.3%) | 1.497 | 0.473+ |
≥8 | 9,192(94.1%) | 572(5.9%) | ||
Missing | 47(94.0%) | 3(6.0%) | ||
