Table 1.
Characteristics of Neonatal Intensive Care Unit Patients for Derivation and Validation Datasets
| No. (%) | |||
|---|---|---|---|
| Baseline Characteristics | Derivation Set (n = 812) | Validation Set (n = 246) | p |
| Time, year | 2016 | 2017 | |
| Mortality | 207 (26%) | 124 (50%) | 0.41 |
| Maternal Age, year | 0.72 | ||
| < 20 | 54 (8%) | 19 (8%) | |
| 21–29 | 452 (65%) | 150 (66%) | |
| ≥ 30 | 186 (27%) | 59 (26%) | |
| Parity | 0.30 | ||
| 1 | 409 (51%) | 132 (54%) | |
| ≥ 2 | 400 (49%) | 111 (46%) | |
| Admission Age, hour | 0.05 | ||
| ≤ 1 | 431 (53%) | 113 (46%) | |
| > 1 | 381 (47%) | 133 (54%) | |
| Sex | 0.75 | ||
| Male | 488 (60%) | 145 (59%) | |
| Female | 325 (40%) | 101 (41%) | |
| Gestational Age, weeks | 0.25 | ||
| ≥ 37 weeks | 532 (66%) | 150 (61%) | |
| 32–36 weeks | 193 (24%) | 56 (23%) | |
| < 32 weeks | 87 (11%) | 40 (16%) | |
| Birthweight, grams | 0.03 | ||
| ≥ 2500 | 465 (57%) | 127 (52%) | |
| 1500–2499 | 263 (32%) | 77 (31%) | |
| < 1500 | 84 (10%) | 42 (17%) | |
| Onset of Labor | 0.09 | ||
| Spontaneous | 666 (94%) | 205 (91%) | |
| Induced | 40 (6%) | 20 (9%) | |
| Duration of labor, mean (SD), hours | 11.8 (9.7) | 11.9 (10.8) | 0.84 |
| Rupture of membranes, mean (SD), hours | 9.8 (31.2) | 19.2 (77.6) | 0.02 |
| Delivery | 0.03 | ||
| Vaginal | 572 (70%) | 191 (78%) | |
| C-Section | 240 (30%) | 55 (22%) | |
| Antenatal Care | 764 (94%) | 234 (95%) | 0.68 |
| Maternal HIV positive | 29 (4%) | 10 (4%) | 0.77 |
| 1st Minute APGAR, mean (SD) | 6.5 (1.5) | 5.9 (1.8) | < 0.001 |
| 5th Minute APGAR, mean (SD) | 7.7 (1.5) | 7.2 (1.7) | < 0.001 |
| Suctioned at Delivery | 161 (20%) | 60 (24%) | 0.12 |
| Bag & Mask at Delivery | 138 (17%) | 65 (26%) | < 0.001 |
| Intubated at Delivery | 22 (3%) | 3 (1%) | 0.18 |
| CPAP used on Admission | 181 (22%) | 83 (34%) | < 0.001 |
| Admission Heart Rate | < 0.001 | ||
| < 100 | 14 (2%) | 20 (8%) | |
| 100–160 | 714 (88%) | 202 (82%) | |
| > 160 | 84 (10%) | 24 (10%) | |
| Admission Respiratory Rate | 0.24 | ||
| < 30 | 28 (3%) | 25 (10%) | |
| 30–60 | 481 (59%) | 128 (52%) | |
| > 60 | 303 (37%) | 93 (38%) | |
| Admission Temperature, Celsius | 0.38 | ||
| < 36.0 | 525 (65%) | 157 (64%) | |
| 36.0–36.4 | 90 (11%) | 25 (10%) | |
| 36.5–37.5 | 139 (17%) | 40 (16%) | |
| > 37.5 | 58 (7%) | 24 (10%) | |
| Admission Respiratory Distress | 0.0047 | ||
| None | 396 (49%) | 96 (39%) | |
| Mild | 64 (8%) | 20 (8%) | |
| Moderate | 233 (29%) | 82 (33%) | |
| Severe | 119 (15%) | 48 (20%) | |
| Admission Level of Consciousness | < 0.001 | ||
| Alert | 677 (84%) | 167 (68%) | |
| Irritable | 21 (3%) | 4 (2%) | |
| Lethargic | 91 (11%) | 53 (22%) | |
| Comatose | 23 (3%) | 22 (9%) | |
| Gestational Size | 0.50 | ||
| Small for Gestational Age | 263 (32%) | 85 (35%) | |
| Appropriate for Gestational Age | 502 (62%) | 149 (61%) | |
| Large for Gestational Age | 45 (6%) | 12 (5%) | |
| Head Size | 0.84 | ||
| Microcephalic | 51 (7%) | 16 (7%) | |
| Normocephalic | 447 (61%) | 149 (63%) | |
| Macrocephalic | 229 (31%) | 72 (30%) | |
APGAR = Appearance, Pulse, Grimace, Activity, and Respiration, CPAP = Continuous Positive Airway Pressure
Comparison of sociodemographic and clinical variables between derivation and validation datasets. Percentages may not add to 100% due to rounding, and numbers may not add to the total due to missing values