Table 5. Extremely and moderately preterm models with prematurity-associated conditions.
| Extremely preterm | Moderately preterm | |||||
|---|---|---|---|---|---|---|
| Variable | Parameter estimate(s) | SE | P-value | Parameter estimate(s) | SE | P-value |
| Intercept | 19.65406 | 18.58351 | 0.2907 | 5.16553 | 5.46977 | 0.3453 |
| Maternal race | ||||||
| Asian | -0.21821 | 0.13315 | 0.1018 | -0.06379 | 0.04363 | 0.1442 |
| Black/African American | 0.00894 | 0.06816 | 0.8957 | 0.01126 | 0.02542 | 0.6578 |
| Multiple races | -0.39875 | 0.15481 | 0.0103* | -0.05709 | 0.05676 | 0.3149 |
| Other | 0.04129 | 0.09334 | 0.6584 | 0.01140 | 0.02757 | 0.6794 |
| Unknown | 0.03405 | 0.12208 | 0.7804 | -0.06567 | 0.04467 | 0.1420 |
| Maternal first trimester BMI | ||||||
| Underweight | -0.25808 | 0.21640 | 0.2336 | -0.06826 | 0.05664 | 0.2286 |
| Overweight | 0.00252 | 0.05995 | 0.9665 | 0.01282 | 0.01687 | 0.4474 |
| Obese | -0.03903 | 0.05690 | 0.4931 | 0.01522 | 0.01546 | 0.3253 |
| Maternal hypertension during pregnancy | 0.06032 | 0.07347 | 0.4120 | -0.02297 | 0.01573 | 0.1446 |
| Preeclampsia | -0.00084 | 0.07457 | 0.9910 | 0.02373 | 0.01568 | 0.1307 |
| Birth year | -0.00928 | 0.00923 | 0.3152 | -0.00256 | 0.00272 | 0.3478 |
| Multiple(s) | -0.00620 | 0.05308 | 0.9070 | 0.04542 | 0.01385 | 0.0011* |
| Gestational age (weeks) | -0.00583 | 0.02319 | 0.8017 | 0.01111 | 0.00784 | 0.1572 |
| Birth weight (gr) | 0.00022 | 0.00017 | 0.1896 | -0.00001 | 0.00003 | 0.6618 |
| Birth length (cm) | -0.01210 | 0.01081 | 0.2635 | -0.00083 | 0.00277 | 0.7645 |
| Head circumference (cm) | -0.02160 | 0.01841 | 0.2414 | -0.00696 | 0.00407 | 0.0879 |
| TPN | -0.03667 | 0.18426 | 0.8423 | 0.00185 | 0.02443 | 0.9397 |
| Received dextrose | 0.11587 | 0.05107 | 0.0237* | 0.01456 | 0.02384 | 0.5416 |
| Length of birth hospitalization stay (days) | -0.00049 | 0.00088 | 0.5749 | -0.00031 | 0.00034 | 0.3673 |
| BPD | 0.04352 | 0.06179 | 0.4815 | -0.01114 | 0.02341 | 0.6343 |
| IVH | -0.05261 | 0.06085 | 0.3876 | 0.00217 | 0.02553 | 0.9323 |
| NEC | 0.08422 | 0.12069 | 0.4856 | 0.03182 | 0.04968 | 0.5220 |
| PDA | -0.00120 | 0.05181 | 0.9815 | 0.00969 | 0.03110 | 0.7554 |
| PVL | -0.28464 | 0.11648 | 0.0149* | -0.00768 | 0.07944 | 0.9231 |
| RDS | -0.00964 | 0.09823 | 0.9218 | -0.00429 | 0.01409 | 0.7609 |
| ROP | -0.11541 | 0.05215 | 0.0273* | 0.10869 | 0.05649 | 0.0545 |
| Atrial septal defect | 0.02489 | 0.04802 | 0.6045 | -0.00311 | 0.01872 | 0.8681 |
| Ventricular septal defect | 0.22274 | 0.11576 | 0.0549 | 0.06055 | 0.05134 | 0.2386 |
Abbreviations: BMI, body mass index; BPD, bronchopulmonary dysplasia; cm, centimeters; gr, grams; IVH, intraventricular hemorrhage; NEC, necrotizing enterocolitis; PDA, patent ductus arteriosus; PVL, periventricular leukomalacia; RDS, respiratory distress syndrome; ROP, retinopathy of prematurity; TPN, total parenteral nutrition
Referent groups: White maternal race, normal maternal first trimester BMI, no hypertension, no preeclampsia, singleton, no TPN, no dextrose, no BPD, no IVH, no NEC, no PDA, no PVL, no RDS, no ROP, no atrial septal defect, no ventricular septal defect.
*p<0.05. P-values were calculated using multivariable linear regression.