Table 3. Birth weight, INTERGROWTH-21st Centile, and Customized Centile by Original Maternal Going-to-Sleep Position.
| Measure | Original Maternal Going-to-Sleep Position | P Valuea | |||
|---|---|---|---|---|---|
| Left | Right | Other | Supine | ||
| No. (%) | 799 (45.4) | 452 (25.7) | 452 (25.7) | 57 (3.2) | |
| Birth weight, gb | |||||
| Adjusted mean (SE) | 3552 (99) | 3544 (99) | 3567 (99) | 3410 (112) | |
| aMD (95% CI) | −8 (−56 to 40) | 15 (−35 to 65) | −143 (−253 to −32) | .06 | |
| INTERGROWTH-21st centilec | |||||
| Adjusted mean (SE) | 58.2 (6.3) | 58.6 (6.3) | 58.9 (6.3) | 48.4 (7.1) | |
| aMD (95% CI) | 0.5 (−2.6 to 3.5) | 0.7 (−2.5 to 3.9) | −9.8 (−16.9 to −2.7) | .04 | |
| INTERGROWTH-21st <10th centile | |||||
| No. (%) | 31 (3.9) | 22 (4.9) | 23 (5.1) | 8 (14.0) | |
| OR | 1 [Reference] | 1.27 (0.73 to 2.22) | 1.33 (0.77 to 2.31) | 4.05 (1.77 to 9.27) | .01 |
| aORc | 1 [Reference] | 1.05 (0.58 to 1.90) | 1.14 (0.62 to 2.09) | 3.39 (1.38 to 8.33) | .06 |
| INTERGROWTH-21st <50th centile | |||||
| No. (%) | 260 (32.5) | 136 (30.1) | 132 (29.2) | 26 (45.6) | |
| OR | 1 [Reference] | 0.89 (0.70 to 1.15) | 0.86 (0.67 to 1.10) | 1.74 (1.01 to 2.99) | .07 |
| aORc | 1 [Reference] | 0.86 (0.65 to 1.12) | 0.80 (0.61 to 1.06) | 1.75 (0.97 to 3.16) | .05 |
| INTERGROWTH-21st >90th centile | |||||
| No. (%) | 181 (22.7) | 100 (22.1) | 103 (22.8) | 10 (17.5) | |
| OR | 1 [Reference] | 0.97 (0.74, 1.28) | 1.01 (0.77, 1.33) | 0.73 (0.36 to 1.47) | .84 |
| aORc | 1 [Reference] | 0.96 (0.73, 1.27) | 1.06 (0.79, 1.42) | 0.71 (0.35 to 1.45) | .74 |
| Customized centiled | |||||
| Adjusted mean (SE) | 49.5 (6.7) | 49.8 (6.7) | 49.6 (6.7) | 40.7 (7.6) | |
| aMD (95% CI) | 0.3 (−3.1 to 3.6) | 0.1 (−3.4 to 3.5) | −8.9 (−16.6 to −1.1) | .15 | |
| Customized centile <10th | |||||
| No. (%) | 88 (11.0) | 50 (11.1) | 41 (9.1) | 9 (15.8) | |
| OR | 1 [Reference] | 1.01 (0.70 to 1.45) | 0.81 (0.55 to 1.19) | 1.52 (0.72 to 3.19) | .41 |
| aORd | 1 [Reference] | 0.99 (0.68 to 1.44) | 0.84 (0.55 to 1.27) | 1.55 (0.72 to 3.35) | .50 |
| Customized centile <50th | |||||
| No. (%) | 410 (51.3) | 225 (49.8) | 230 (50.9) | 39 (68.4) | |
| OR | 1 [Reference] | 0.94 (0.75 to 1.18) | 0.98 (0.78 to 1.24) | 2.06 (1.16 to 3.65) | .08 |
| aORd | 1 [Reference] | 0.93 (0.73 to 1.17) | 1.00 (0.78 to 1.28) | 2.08 (1.16 to 3.72) | .07 |
| Customized centile >90th | |||||
| No. (%) | 78 (9.8) | 40 (8.9) | 40 (8.9) | 3 (5.3) | |
| OR | 1 [Reference] | 0.90 (0.60 to 1.34) | 0.90 (0.60 to 1.34) | 0.51 (0.16 to 1.68) | .69 |
| aORd | 1 [Reference] | 0.89 (0.59 to 1.33) | 0.90 (0.59 to 1.37) | 0.49 (0.15 to 1.63) | .66 |
Abbreviations: aMD, adjusted mean difference; aOR, adjusted odds ratio; OR, odds ratio.
P values reflect the comparison between the 4 groups.
Adjusted for study site, gestation at interview and delivery, 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.