Table 1.
Study Variables (N=272 to 331)
| Variable Name | N | Mean(SD) | Note |
|---|---|---|---|
| Bayley (Outcome Variables) | |||
| Mental Development Index 12 month (MDI) | 272 | 104(23) | continuous |
| Psychomotor Development 12 month (PDI) | 272 | 96(21) | continuous |
| Medical Risk (Input Variables) | |||
| Total Days on Supplemental Oxygen * | 303 | 29.2(44.1) | continuous |
| Intra-Ventricular Hemorrhaging (IVH) | 303 | 0.44(0.94) | continuous |
| Intra-Ventricular hemorrhaging (IVH) * | 303 | 0.23(0.42) | 0/1 |
| Neurological Malformation (NEURAL) | 303 | 0.003(0.057) | 0/1 |
| Seizures | 303 | 0.023(0.150) | 0/1 |
| Echodense Lesion | 303 | 0.116(0.320) | 0/1 |
| Cystic Periventricular Leukomalacia | 303 | 0.050(0.217) | 0/1 |
| Porencephaly on follow-up Sonogram | 303 | 0.026(0.161) | 0/1 |
| Post-Hemorrhaging | 303 | 0.056(0.231) | 0/1 |
| Ventriculo Peritoneal Shunt | 303 | 0.017(0.128) | 0/1 |
| Meninges (MENING) | 303 | 0.007(0.081) | 0/1 |
| Sum of IVH to MENING (MED_ACUM) | 303 | 0.528(1.088) | continuous |
| Sum of NEURAL to MENING (MED_ACUM2) * | 303 | 0.297(0.816) | continuous |
| MED_ACUM >0 | 303 | 0.281(0.450) | 0/1 |
| MED_ACUM2 >0 | 303 | 0.182(0.386) | 0/1 |
| Social/Demographic (Input Variables) | |||
| Maternal Cocaine Use * | 331 | 0.13(0.34) | 0/1 |
| Multiple Birth * | 331 | 0.24(0.43) | 0/1 |
| Bronchopulmonary Dysplasia * | 331 | 0.38(0.49) | 0/1 |
| Very Low Birthweight without BPD * | 331 | 0.24(0.43) | 0/1 |
| Very Low Birthweight with or without BPD | 331 | 0.62(0.49) | 0/1 |
| Healthy Term Control | 331 | 0.38(0.49) | 0/1 |
| Gestational Age in weeks * | 331 | 32.7(5.9) | continuous |
| Social Economic Status * | 321 | 3.67(1.06) | continuous |
| White Race * | 331 | 0.46(0.5) | 0/1 |
| Birthweight * | 330 | 1950(1192) | continuous |
| Primary Caregiver is Biological Mother * | 297 | 0.96(0.19) | 0/1 |
| Mother's Age at Birth * | 318 | 27.7(5.8) | continuous |
| Mother's Education * | 318 | 13.2(2.3) | continuous |
0/1: 0=NO, l=YES
*
= regression variables