Table 4

Univariate and multivariate analysis of factors associated with the risk of ROP among premature infants with gestational age ≤32 weeks and birth weight ≤1500 g (n=235)

Crude relative riskp ValueAdjusted relative riskp Value
Birth weight0.996 (0.994 to 0.998)<0.0010.999 (0.996 to 1.001)0.178
Gestational age0.589 (0.501 to 0.691)<0.0010.774 (0.603 to 0.994)0.044
Surfactant<0.0010.261
 Yes5.955 (2.607 to 13.603)1.778 (0.651 to 4.854)
 No1.01.0
Septicaemia0.0070.668
 Yes2.830 (1.325 to 6.046)1.206 (0.513 to 2.832)
 No1.01.0
Birth apnoea0.0010.209
 Yes3.525 (1.657 to 7.499)1.723 (0.737 to 4.029)
 No1.01.0
Blood transfusions<0.0010.349
 Yes7.467 (3.014 to 18.499)1.757 (0.540 to 5.721)
 No1.01.0
Phototherapy0.1690.951
 Yes2.106 (0.728 to 6.090)0.963 (0.292 to 3.183)
 No1.01.0
Respiratory distress syndrome0.0140.714
 Yes2.940 (1.243 to 6.953)1.194 (0.464 to 3.071)
 No1.01.0
  • ROP, retinopathy of prematurity.