Table 1.
Clinical characteristics of 254 extremely premature infants by BPD status.
| Control (N = 171) | BPD (N = 83) | Z/t/χ2 | P-value | |
|---|---|---|---|---|
| Gestational Age [Wk, M(Q1,Q3)] | 27.1 (26.2, 27.6) | 26.3 (25.5, 27.2) | −4.01 | <0.001 |
| Birth Weight [gr, M(Q1,Q3)] | 930 (842, 1,060) | 858 (720, 950) | −4.378 | <0.001 |
| Sex (male) | 91 | 49 | 0.765 | 0.382 |
| Gestational Diabetes Mellitus (GDM) | 21 | 7 | 0.843 | 0.359 |
| Gestational Hypertension (GH) | 18 | 7 | 0.276 | 0.600 |
| Antenatal steroid | 134 | 66 | 0.094 | 0.760 |
| PPROM | 56 | 35 | 2.375 | 0.123 |
| Twin | 48 | 28 | 0.855 | 0.355 |
| Delivery (C-section) | 60 | 28 | 0.045 | 0.832 |
| AS1min [score, M(Q1,Q3)] | 8 (5, 9) | 6 (5, 8) | −2.049 | 0.040 |
| AS5min [score, M(Q1,Q3)] | 10 (9, 10) | 10 (9, 10) | −1.015 | 0.310 |
| Surfactant | 124 | 76 | 11.250 | 0.001 |
| Early onset sepsis (EOS) | 75 | 55 | 11.959 | 0.003 |
| Intubation | 83 | 64 | 21.826 | <0.001 |
| Duration of intubation (Days) | 0 (0,1) | 3.6 (0.8, 22) | −4.417 | <0.001 |
| Duration of CPAP (Days) | 16 (7, 30) | 23 (14, 41) | −3.664 | <0.001 |
| Duration of supplemental oxygen (Days) | 24 (13, 41) | 50 (32, 71) | −6.470 | <0.001 |
CPAP, continuous positive airway pressure. Continuous parameters were displayed as median [interquartile range (IQR)], and analyzed by Mann-Whitney U-test. Categorical variables were displayed with numbers and analyzed by Chi-square test. The statistics were performed using SPSS statistical software version 24.0 (IBM Corporation, NY).