Fresh cycles | Frozen cycles | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Study group N = 1196 | Control group N = 1576 | P value | OR, 95% CI | Adjusted P value | Adjusted OR, 95% CI | Study group N = 1275 | Control group N = 2173 | P value | OR, 95% CI | Adjusted P value | Adjusted OR, 95% CI |
Gestational age | 262.8 ± 8.4 | 268.9 ± 13.9 | 0.000 | / | / | / | 263.0 ± 15.7 | 273.0 ± 10.5 | 0.000 | / | / | / |
PTB | 258 (21.6) | 159 (10.1) | 0.000 | 2.45(1.98–3.03) | 0.000* | 2.41(1.93–2.99) | 230 (18.0) | 160 (7.4) | 0.000 | 2.77 (2.23,3.43) | 0.000* | 2.68 (2.15,3.33) |
birthweight | 2962.4 ± 563.1 | 3104.9 ± 498.5 | 0.000 | / | / | / | 3099 ± 662.1 | 3352 ± 671.5 | 0.000 | / | / | / |
LBW | 201(16.8) | 138 (8.8) | 0.000 | 2.11 (1.67–2.65) | 0.000* | 2.21 (1.74–2.80) | 204 (16.0) | 145 (6.6) | 0.000 | 2.67 (2.13–3.34) | 0.000* | 2.07 (2.12,3.35) |
SGA | 90 (7.5) | 111 (7.1) | 0.561 | 1.09 (0.82–1.45) | 0.960 | 1.01 (0.75,1.35) | 60 (4.7) | 104 (4.8) | 0.915 | 0.98 (0.71–1.36) | 0.730 | 0.94 (0.68,1.31) |
Congenital malformation | 20 (1.7) | 28 (1.8) | 0.835 | 0.94 (0.53–1.68) | 0.640 | 0.87 (0.48–1.57) | 25 (2.0) | 43 (19.8) | 0.971 | 0.99 (0.60,1.63) | 0.940 | 0.98 (0.59,1.62) |
Pediatrics admission | 280 (23.4) | 169 (10.7) | 0.000 | 2.55 (2.07–3.13) | 0.000* | 2.62 (2.12–3.24) | 256 (20.1) | 190 (8.7) | 0.000 | 2.62 (2.14–3.21) | 0.000* | 2.60 (2.12,3.19) |
NICU admission | 60 (5.0) | 26 (1.6) | 0.001 | 1.98 (1.32,2.96) | 0.001* | 2.04 (1.36,3.08) | 46 (3.6) | 36 (1.7) | 0.000 | 2.22 (1.43,3.46) | 0.001* | 2.21 (1.41,3.44) |