Clinical Study
Association of Maternal Age to Development and Progression of Retinopathy of Prematurity in Infants of Gestational Age under 33 Weeks
Table 3
Univariate analyses of risk factors for the laser treatment in gestational age <33 weeks infants.
| Variable | Untreated infants () | Treated infants () | P value | Odds ratio | 95% CI |
| Gestational age (weeks)† | 30.0 (28.3–31.8) | 26.0 (24.2–27.5) | | 0.507 | 0.411–0.625 | Birth weight (g) † | 1217 (901–1524) | 754 (595–894) | | 0.996 | 0.995–0.998 | Maternal age (years) † | 33 (30–37) | 30 (28–34) | | 0.917 | 0.852–0.986 | SGA (, %) | 49 (36) | 13 (29) | 0.398 | 0.730 | 0.350–1.519 | Apgar score; 1 min† | 6 (3–8) | 3 (2–5) | | 0.783 | 0.680–0.901 | Apgar score; 5 min† | 8 (6–9) | 6 (4–7) | | 0.700 | 0.588–0.833 | Multiple birth (, %) | 42 (31) | 6 (13) | | 0.348 | 0.137–0.885 | Gender; Male (, %) | 72 (53) | 23 (51) | 0.866 | 0.944 | 0.481–1.852 | Pulmonary surfactant (, %) | 57 (42) | 29 (64) | | 2.544 | 1.265–5.115 |
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CI: confidence interval; ROP: retinopathy of prematurity; SGA: small for gestational age. . Median (interquartile range).
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