Table 3.
The estimate and adjusted OR of logistic regression analysis on the training cohort
| Parameter | Estimate | Adjusted OR (95% CI) | P value |
|---|---|---|---|
| Intercept | -3.7154 | - | <.0001 |
| Mothers’ Age (%) | |||
| ≤ 24 Years | - | 1.0 (1.0–1.0) | - |
| 25-29 Years | 0.0129 | 1.013 (0.995, 1.032) | 0.169 |
| 30-34 Years | 0.1221 | 1.130 (1.108, 1.152) | <.0001 |
| ≥ 35 Years | 0.3034 | 1.354 (1.325, 1.385) | <.0001 |
| Mothers’ Nativity (%) | |||
| Born in U.S. | - | 1.0 (1.0–1.0) | - |
| Born Outside U.S. /Unknown/Not Stated | -0.1274 | 0.880 (0.863, 0.898) | <.0001 |
| Mothers’ Race (%) | |||
| White | - | 1.0 (1.0–1.0) | - |
| Black | 0.5727 | 1.773 (1.743, 1.803) | <.0001 |
| American Indian/Alaskan Native/Asian or Pacific Islander | 0.0917 | 1.096 (1.066, 1.127) | <.0001 |
| Mothers’ Hispanic Origin (%) | |||
| Non-Hispanic/Hispanic Origin Not Stated | - | 1.0 (1.0–1.0) | - |
| Hispanic | 0.0323 | 1.033 (1.013, 1.053) | 0.009 |
| Marital Status (%) | |||
| Married | - | 1.0 (1.0–1.0) | - |
| Unmarried | 0.2819 | 1.326 (1.304, 1.347) | <.0001 |
| Mothers’ Education (%) | |||
| ≤ High School or GED/Unknown | - | 1.0 (1.0–1.0) | - |
| Associate/Some College Credit | -0.1725 | 0.842 (0.828, 0.856) | <.0001 |
| ≥ Bachelor's | -0.3382 | 0.713 (0.698, 0.729) | <.0001 |
| Missing | 0.0031 | 1.003 (0.966, 1.042) | 0.8727 |
| Pre-pregnancy Smoking Status (%) a | |||
| Nonsmoker | - | 1.0 (1.0–1.0) | - |
| Smoker/Unknown/Not Stated | 0.1677 | 1.183 (1.160, 1.206) | <.0001 |
| Pre-pregnancy BMI (%) a | |||
| Under Weight-Normal ≤24.9 | - | 1.0 (1.0–1.0) | - |
| Overweight 25.0-29.9 | -0.0174 | 0.983 (0.966, 1.000) | 0.0472 |
| Obesity ≥30.0/Unknown/Not Stated | 0.1195 | 1.127 (1.109, 1.145) | <.0001 |
| Pre-pregnancy Diabetes Status (%) a | |||
| No/Unknown/Not Stated | - | 1.0 (1.0–1.0) | - |
| Yes | 0.5741 | 1.776 (1.685, 1.871) | <.0001 |
| Pre-pregnancy Hypertension Status (%) a | |||
| No/Unknown/Not Stated | - | 1.0 (1.0–1.0) | |
| Yes | 0.6849 | 1.984 (1.913, 2.056) | <.0001 |
| Previous Preterm Birth Status (%) a | |||
| No/Unknown/Not Stated | - | 1.0 (1.0–1.0) | - |
| Yes | 1.0999 | 3.004 (2.929, 3.081) | <.0001 |
| Infertility Treatment Usage Status (%) a | |||
| No/Unknown/Not Stated | - | 1.0 (1.0–1.0) | - |
| Yes | 1.6299 | 5.103 (4.888, 5.328) | <.0001 |
| Fertility Enhancing Drug Usage Status (%) a | |||
| No/Not Applicable/Unknown/Not Stated | - | 1.0 (1.0–1.0) | - |
| Yes | -0.1988 | 0.820 (0.769, 0.873) | <.0001 |
| Delivery Payment Source (%) a | |||
| Medicaid | - | 1.0 (1.0–1.0) | - |
| Private Insurance | -0.0352 | 0.965 (0.948, 0.983) | <.0001 |
| Self-pay/Other/Unknown | 0.0762 | 1.079 (1.054, 1.105) | <.0001 |
a: For the following parameters after mothers’ education, missing observations were automatically excluded from the analysis, and the corresponding parameters were automatically set to 0 due to they are from the same subset