InSurE, intubate-surfactant-extubate; LISA, less invasive surfactant administration; n, number; g, grams; SD, standard deviation; ELBW, extremely low birth weight; VLBW, very low birth weight; LBW, low birth weight; SGA, small for gestational age; AGA, appropriate for gestational age; LGA, large for gestational age; PPROM preterm premature rupture of membrane; GDM gestational diabetes mellitus; APH antepartum hemorrhage; PIH pregnancy-induced hypertension; IQR, interquartile range.

*Z test.; ** Chi-Square Test ; ***Fisher’s exact test; #Mann–Whitney U-test

TABLE -2. Outcome variables of the study group