Table 2. Comparison of Secondary Outcomes With Matched Pairs of Exposed and Referent Neonates.
| Clinical Characteristic | No. (%) | Odds Ratio (95% CI) | |
|---|---|---|---|
| Exposed | Unexposed | ||
| ROP treated | |||
| No. of neonates with ROP evaluated | 108 | 191 | NA |
| No. of matched pairs used with ROP evaluated | 44 | 44 | NA |
| No | 44 (100) | 44 (100) | NA |
| Yes | 0 (0) | 0 (0) | NAa |
| Chronic lung disease | |||
| No. of neonates still in hospital at CGA ≥36 wk | 91 | 162 | NA |
| No. of matched pairs used that were still in hospital at CGA ≥36 wk | 38 | 38 | NA |
| No | 11 (29) | 9 (24) | NA |
| Yes | 27 (71) | 29 (76) | 0.78 (0.28-2.19)b |
| Periventricular leukomalacia | |||
| No. of neonates with cranial imaging | 149 | 293 | NA |
| No. of matched pairs used with cranial imaging | 80 | 80 | NA |
| No | 75 (94) | 76 (95) | NA |
| Yes | 5 (6) | 4 (5) | 1.27 (0.33-4.90) |
Abbreviations: CGA, corrected gestational age; iNO, inhaled nitric oxide; NA, not applicable; PS, propensity score; ROP, retinopathy of prematurity.
a
The odds ratio was not estimated because of the lack of events in both groups.
b
Adjusted for inborn/outborn status.