Table 2.
Adjusted odds ratios for the associations between body mass index and gestational weight gain and large for gestational age in British Columbia, Ontario, Nova Scotia, and Newfoundland
| BC | ON | NS | NL | |||||
|---|---|---|---|---|---|---|---|---|
| Crude risk (%) | Adjusted OR (95% CI) | Crude risk (%) | Adjusted OR (95% CI) | Crude risk (%) | Adjusted OR (95% CI) | Crude risk (%) | Adjusted OR (95% CI) | |
| All women | ||||||||
| BMI | ||||||||
| Underweight | 4.7 | 0.45 (0.34, 0.58) | 3.3 | 0.44 (0.37, 0.52) | 5.4 | 0.58 (0.32, 1.06) | 4.0 | 0.46 (0.14, 1.51) |
| Normal weight | 10.4 | Ref | 7.8 | Ref | 9.8 | Ref | 9.8 | Ref |
| Overweight | 17.8 | 1.81 (1.65, 1.99) | 12.7 | 1.66 (1.58, 1.76) | 13.7 | 1.43 (1.17, 1.75) | 17.8 | 1.87 (1.37, 2.55) |
| Obese | 23.5 | 2.53 (2.28, 2.80) | 18.4 | 2.50 (2.36, 2.63) | 19.2 | 2.09 (1.73, 2.52) | 21.8 | 2.28 (1.70, 3.05) |
| GWG | ||||||||
| < Recommended | 8.0 | 0.78 (0.68, 0.90) | 5.8 | 0.76 (0.70, 0.82) | 7.6 | 0.75 (0.56, 1.02) | 10.7 | 1.13 (0.66, 1.92) |
| =Recommended | 8.9 | Ref | 7.1 | Ref | 8.6 | Ref | 7.5 | Ref |
| > Recommended | 17.7 | 1.91 (1.71, 2.12) | 14.7 | 2.04 (1.93, 2.16) | 16.3 | 1.98 (1.57, 2.49) | 18.5 | 2.51 (1.67, 3.76) |
| Nulliparous | ||||||||
| BMI | ||||||||
| Underweight | 3.9 | 0.48 (0.33, 0.70) | 2.8 | 0.47 (0.37, 0.59) | a | 0.53 (0.19, 1.47) | 2.4 | 0.45 (0.06, 3.41) |
| Normal weight | 7.8 | Ref | 5.9 | Ref | 7.2 | Ref | 5.9 | Ref |
| Overweight | 12.5 | 1.67 (1.42, 1.95) | 10.0 | 1.73 (1.58, 1.90) | 8.9 | 1.25 (0.88, 1.79) | 15.4 | 2.57 (1.52, 4.33) |
| Obese | 20.3 | 2.90 (2.47, 3.42) | 14.2 | 2.50 (2.27, 2.75) | 15.8 | 2.40 (1.76, 3.28) | 16.7 | 2.63 (1.56, 4.43) |
| GWG | ||||||||
| < recommended | 5.2 | 0.79 (0.61, 1.02) | 3.4 | 0.72 (0.61, 0.85) | 4.7 | 0.71 (0.39, 1.27) | 9.4 | 1.93 (0.65, 5.76) |
| =recommended | 5.9 | Ref | 4.3 | Ref | 5.8 | Ref | 3.3 | Ref |
| > recommended | 13.4 | 2.06 (1.73, 2.46) | 11.0 | 2.26 (2.04, 2.51) | 11.6 | 1.89 (1.26, 2.84) | 13.4 | 3.43 (1.46, 8.06) |
| Parous | ||||||||
| BMI | ||||||||
| Underweight | 5.9 | 0.42 (0.29, 0.60) | 3.9 | 0.42 (0.34, 0.52) | 7.3 | 0.62 (0.29, 1.30) | 5.7 | 0.49 (0.11, 2.10) |
| Normal weight | 13.1 | Ref | 9.4 | Ref | 12.3 | Ref | 13.5 | Ref |
| Overweight | 22.2 | 1.89 (1.67, 2.13) | 14.5 | 1.63 (1.52, 1.74) | 17.6 | 1.53 (1.19, 1.96) | 20.0 | 1.57 (1.06, 2.34) |
| Obese | 25.9 | 2.33 (2.04, 2.65) | 20.8 | 2.49 (2.33, 2.66) | 21.6 | 1.94 (1.54, 2.46) | 25.6 | 2.12 (1.48, 3.02) |
| GWG | ||||||||
| < Recommended | 10.2 | 0.78 (0.65, 0.93) | 7.1 | 0.77 (0.70, 0.84) | 9.3 | 0.77 (0.54, 1.10) | 11.4 | 0.90 (0.49, 1.65) |
| =Recommended | 11.9 | Ref | 9.1 | Ref | 10.8 | Ref | 10.8 | Ref |
| > Recommended | 22.4 | 1.83 (1.60, 2.09) | 18.0 | 1.95 (1.82, 2.08) | 21 | 2.01 (1.53, 2.66) | 23.7 | 2.27 (1.43, 3.63) |
Abbreviations: BC, British Columbia; BMI, body mass index; CI, confidence interval; GWG, gestational weight gain; N, number; NL, Newfoundland and Labrador; NS, Nova Scotia; ON, Ontario; OR, odds ratio; ref, reference
aActual value suppressed due to restrictions in database