Table 2.
Medical Characteristics of Participants by Clinically Relevant Groups and Total Sample1
| Normal | Moderate | Severe | ||
|---|---|---|---|---|
| Oxygenation | Hyperoxia | Hyperoxia | Total | |
| n = 6 | n = 15 | n = 12 | n = 35 | |
| Highest arterial PaO2 (mm Hg)2 | 65 (14) a | 154 (30) b | 274 (52) c | 182 (86) |
| Gestational age — wks | 31.5 (1.9) | 31.1 (2.2) | 29.9 (1.3) | 30.9 (2.0) |
| Birthweight — gms2 | 1460 (95)a | 1286 (225) b | 1210 (130) b | 1290 (204) |
| Umbilical Cord pH | 7.28 (0.03) | 7.27 (0.08) | 7.29 (0.08) | 7.28 (0.07) |
| Days on Ventilator | 1.8 (1.7) | 1.1 (1.4) | 2.2 (2.6) | 1.5 (1.9) |
| Total Days on Oxygen | 1.5 (1.2) | 2.5 (4.6) | 4.7 (5.2) | 3.0 (4.4) |
| Apgar, 5 min % >8 | 50% | 73.2% | 50% | 52.6 |
| Socioeconomic status3 | 27.8 (8.5) | 25.4 (5.0) | 27.7 (10.4) | 27 (9.0) |
1
All data are Mean (S.D.) with exception of Apgar score.
2
PaO2 groups, Normal Oxygenation = 40 − 105 mm Hg; Moderate Hyperoxia = 106 − 199 mm Hg; Severe Hyperoxia = ≥ 200 mm Hg; 3Indicates significant group effect, p < .05, groups with different letters are significantly different from other groups.
3
Based on Hollingshead, Four Factor Scale (1994); range = 0 to 66.