Table 4 Risk factor for retinopathy of prematurity in other studies

Reyes et al., 2017. Oman [46]

< 32

< 1500

low BW, low GA, duration of invasive ventilation, duration of oxygen therapy, duration of nasal CPAP, late onset clinical or proven sepsis

Shah et al., 2005 Singapore [40]

< 32

< 1500

Preeclampsia, low BW, prolonged duration of ventilation, pulmonary hemorrhage and CPAP

Yau et al., 2016, China [45]

< 32 and > 32

< 1500

low GA, low BW, preeclampsia, gestational diabetes mellitus, inotrope use, postnatal hypotension, apgar score (1 min, 5 min and 10 min), respiratory distress syndrome, bronchopulmonary dysplasia, invasive mechanical ventilation, surfactant use, oxygen supplement, patent ductus arteriosus, thrombocytopenia, blood transfusion, anemia, NSAID use, sepsis

Abdel HA et al., 2012, Egypt [34]

< 32 and > 32

< 1500 and > 1500

low GA, oxygen therapy, frequency of blood transfusions and sepsis

Chen et al., 2011, USA [41]

< 30

< 1500

low GA, Sepsis, oxygen exposure

Hadi and Hamdy, 2013, Egypt [37]

< 32

< 1250

low GA, low BW, Ventilation, blood transfusions, sepsis, Patent ductus arteriosus, IVH

Nair et al., 2001, Oman [36]

< 32

< 1500

low BW, Low GA, TPN