Table 4 Estimates for parameters of partial-proportional odds model
Variable | Partial-proportional | P-value | |||
|---|---|---|---|---|---|
(Inadequate | Adequate)a | (Adequate | Excessive)b | ||||
Estimate (SE) | OR (95% CI) | Estimate (SE) | OR (95% CI) | ||
Week of visit | -0.238(0.014) | 0.788(0.766,0.810) | 0.110(0.011) | 1.116(1.09, 1.140) | - |
Pre-pregnancy BMI | 0.068(0.029) | 1.070(1.011, 1.133) | -0.068(0.029) | 0.934(0.883,0.989) | 0.021* |
Maternal age | 0.030(0.025) | 1.030(0.981, 1.082) | -0.030(0.025) | 0.971(0.924, 1.019) | 0.239 |
Maternal education (Lower than diploma as reference) | |||||
Diploma | -0.070(0.290) | 0.932(0.528,1.646) | 0.070(0.290) | 1.073(0.607, 1.893) | 0.809 |
College grad | -0.364(0.374) | 0.694(0.334,1.446) | 0.364(0.374) | 1.440(0.691, 2.995) | 0.330 |
Number of previous live births (Zero as reference) | |||||
One | 0.128(0.423) | 1.137(0.496,2.60) | -0.128(0.423) | 0.879(0.384, 2.016) | 0.762 |
Two or more | -0.026(0.515) | 0.974(0.355,2.673) | 0.026(0.515) | 1.026(0.374, 2.816) | 0.959 |
Planned pregnancy (Yes as reference) | |||||
No | 0.505(0.410) | 1.658(0.742, 3.70) | -0.505(0.410) | 0.603(0.270, 1.348) | 0.218 |
Underlying disease (No as reference) | |||||
Yes | -0.543(0.312) | 0.581(0.315,1.071) | 0.543(0.312) | 1.722(0.934, 3.172) | 0.081 |
Season of conception (Spring as reference) | |||||
Summer | -0.015(0.286) | 0.985(0.562, 1.725) | 0.015(0.286) | 1.015(0.579, 1.778) | 0.959 |
Autumn & winter | -0.727(0.460) | 0.483(0.196, 1.191) | 0.727(0.460) | 2.070(0.839, 5.097) | 0.114 |
Husband Employment-Status (Self-employed as reference) | |||||
Unemployed | -0.729(0.503) | 0.482(0.180, 1.293) | 0.729(0.503) | 2.073(0.773, 5.556) | 0.147 |
Worker | -0.059(0.311) | 0.943(0.512, 1.734) | 0.059(0.311) | 1.061(0.576, 1.951) | 0.849 |
Employee | 0.291(0.483) | 1.334(0.519, 3.448) | -0.291(0.483) | 0.747(0.290, 1.926) | 0.547 |
Random components of partial -proportional odds | |||||
Intercept sd | 2.314 | ||||