Table 2

Risk of ROP among premature infants (gestational age ≤35 weeks and birth weight ≤2000 g) included in the study (n=301)

VariableExaminedInfants with ROPp Value*
CountCount%
Overall301279.0
Gender0.289
 Male163127.4
 Female1381510.9
Supplemental oxygen0.002
 Yes2282711.8
 No7300
Surfactant<0.001
 Yes711926.8
 No23083.5
Septicaemia<0.001
 Yes801518.8
 No221125.4
Birth apnoea<0.001
 Yes571322.8
 No244145.7
Blood transfusions<0.001
 Yes842125.0
 No21762.8
Phototherapy0.091
 Yes2142310.7
 No8744.6
Respiratory distress syndrome0.009
 Yes33721.2
 No268207.5
Meeting international screening criteria0.004
 Yes2352711.5
 No6600.0
  • *p Values are for χ2 test (or Fisher's exact test when necessary).

  • ROP, retinopathy of prematurity.