lung recruitment group (n = 92) | Control group (n = 92) | t/χ2 | P | |
---|---|---|---|---|
Gestational age, mean (SD), wk | 29.75 ± 1.86 | 29.69 ± 1.66 | 0.218 | 0.828 |
Birth weight, mean (SD), kg | 1.32 ± 0.28 | 1.29 ± 0.25 | 0.719 | 0.473 |
Gender,boy, n(%) | 55 (60) | 60 (65) | 0.580 | 0.446 |
Cesarean section, n(%) | 56 (61) | 65 (71) | 1.955 | 0.162 |
Mothers’ characteristics | ||||
Mother’s age, mean (SD), year | 29.74 ± 5.19 | 30.71 ± 5.27 | 1.254 | 0.211 |
Antenatal steroids, n(%) | 54 (59) | 48 (52) | 0.792 | 0.374 |
gestational diabetes mellitus, n(%) | 8 (9) | 22 (24) | 7.806 | 0.005 |
amniotic fluid pollution, n(%) | 7 (8) | 10 (11) | 0.583 | 0.445 |
intrauterine infection, n(%) | 29 (32) | 34 (37) | 0.603 | 0.437 |
Hypertension disorders, n(%) | 21 (23) | 19 (21) | 0.128 | 0.721 |
premature rupture of membranes, n(%) | 16 (17) | 20 (22) | 0.553 | 0.457 |
Asphyxia, n(%) | 18 (20) | 15 (16) | 0.332 | 0.564 |
Apgar,1 min,median (minimum,maximum) | 9 (3,10) | 10 (2,10) | 0.703 | 0.483 |
Apgar,5 min,median (minimum,maximum) | 10 (7,10) | 10 (6,10) | 0.560 | 0.576 |
Apgar,10 min,median (minimum,maximum) | 10 (8,10) | 10 (7,10) | 0.379 | 0.705 |