Table 2. Birth Weight, INTERGROWTH-21st Centile, and Customized Centile by Maternal Going-to-Sleep Position.
| Measure | Maternal Going-to-Sleep Position | |
|---|---|---|
| Nonsupine | Supine | |
| Total study population, No. (%) | 1703 (96.8) | 57 (3.2) |
| Birth weight, ga | ||
| Mean (SE) | 3554 (98) | 3410 (112) |
| aMD (95% CI) | −144 (−253 to −36) | |
| INTERGROWTH-21st centileb | ||
| Mean (SE) | 58.6 (6.2) | 48.5 (7.1) |
| aMD (95% CI) | −10.1 (−17.1 to −3.1) | |
| INTERGROWTH-21st centile <10thb | ||
| No. (%) | 76 (4.5) | 8 (14.0) |
| OR | 1 [Reference] | 3.50 (1.60 to 7.64) |
| aOR | 1 [Reference] | 3.23 (1.37 to 7.59) |
| INTERGROWTH-21st centile <50thb | ||
| No. (%) | 528 (31.0) | 26 (45.6) |
| OR | 1 [Reference] | 1.87 (1.10 to 3.18) |
| aOR | 1 [Reference] | 1.90 (0.83 to 4.34) |
| INTERGROWTH-21st centile >90thb | ||
| No. (%) | 384 (22.6) | 10 (17.5) |
| OR | 1 [Reference] | 0.73 (0.37 to 1.46) |
| aOR | 1 [Reference] | 0.67 (0.32 to 1.41) |
| Customized centilec | ||
| Mean (SE) | 49.7 (6.7) | 40.7 (7.6) |
| aMD (95% CI) | −9.0 (−16.6 to −1.4) | |
| Customized centile <10thc | ||
| No. (%) | 179 (11.0) | 9 (15.8) |
| OR | 1 [Reference] | 1.60 (0.77 to 3.31) |
| aOR | 1 [Reference] | 1.63 (0.77 to 3.44) |
| Customized centile <50thc | ||
| No. (%) | 865 (50.8) | 39 (68.4) |
| OR | 1 [Reference] | 2.10 (1.19 to 3.70) |
| aOR | 1 [Reference] | 2.12 (1.20 to 3.76) |
| Customized centile >90thc | ||
| No. (%) | 158 (9.3) | 3 (5.3) |
| OR | 1 [Reference] | 0.54 (0.17 to 1.76) |
| aOR | 1 [Reference] | 0.53 (0.16 to 1.70) |
Abbreviations: aMD, adjusted mean difference; aOR, adjusted odds ratio; OR, odds ratio.
Adjusted for study site, gestation, infant sex, and maternal age, height, weight, parity, ethnicity, preexisting diabetes, preexisting hypertension, antepartum hemorrhage, gestational hypertensive disorder, gestational diabetes, cigarette smoking, and recreational drug use.
Adjusted for study site and maternal age, height, weight, parity, ethnicity, preexisting diabetes, preexisting hypertension, antepartum hemorrhage, gestational hypertensive disorder, gestational diabetes, cigarette smoking, and recreational drug use.
Adjusted for study site and maternal age, preexisting diabetes, preexisting hypertension, antepartum hemorrhage, gestational hypertensive disorder, gestational diabetes, cigarette smoking, and recreational drug use.