Table 6.
Significant factors in the multinomial logistic regression for GWG under, within (reference category) and above IOM recommendations
| Parameter | Odds ratio | Standard error | 95% confidence interval |
|---|---|---|---|
| Under recommendations versus within recommendations | |||
| Maternal BMI | 1.041 | 0.004 | 1.034–1.048 |
| Age at conception | 0.987 | 0.005 | 0.978–0.996 |
| First birth | 0.617 | 0.053 | 0.521–0.731 |
| Second birth | 0.794 | 0.042 | 0.716–0.879 |
| Gestation length | 0.989 | 0.003 | 0.982–0.995 |
| Systolic blood pressure | 1.001 | 0.002 | 0.998–1.005 |
| Over recommendations versus within recommendations | |||
| Maternal BMI | 1.030 | 0.003 | 1.024–1.036 |
| Age at conception | 0.998 | 0.004 | 0.991–1.006 |
| First birth | 1.558 | 0.100 | 1.374–1.766 |
| Second birth | 1.372 | 0.059 | 1.261–1.493 |
| Gestation length | 1.016 | 0.003 | 1.010–1.021 |
| Systolic blood pressure | 1.005 | 0.002 | 1.001–1.008 |