| Intervention NICUs (N= 2) | Control NICUs (N= 88) | ||||||
---|---|---|---|---|---|---|---|---|
Variables | Pre-WS (n = 146) | Post-WS (n = 148) | p value | MD or OR (95% CI) | Pre-WS (n = 3,322) | Post-WS (n = 2,912) | p value | MD or OR (95% CI) |
Maternal age (years) | 31.2 ± 5.1 | 31.6 ± 5.4 | 0.56 | 0.43 (−0.78, 1.64) | 31.2 ± 5.2 | 31.4 ± 5.3 | 0.37 | 0.12 (−0.15, 0.39) |
Missing | 1 | 0 | Â | Â | 166 | 47 | Â | Â |
Primipara | 121 (82.9) | 116 (78.4) | 0.32 | 0.75 (0.42, 1.34) | 2,836 (85.4) | 2,514 (86.3) | 0.27 | 1.08 (0.94, 1.25) |
Multiple pregnancy | 42 (28.8) | 40 (27.0) | 0.73 | 0.92 (0.55,1.53) | 834 (25.1) | 681 (23.4) | 0.11 | 0.91 (0.81, 1.02) |
Maternal hypertension | 22 (15.1) | 25 (16.9) | 0.67 | 1.15 (0.61, 2.14) | 625/3,320 (18.8) | 589/2,815 (20.9) | 0.04 | 1.14 (1.01, 1.29) |
Maternal diabetes | 3 (2.1) | 3 (2.0) | 0.98 | 0.99 (0.20, 4.97) | 44/3,320 (1.3) | 52/2,749 (1.9) | 0.08 | 1.44 (0.96, 2.15) |
PROM | 51 (34.9) | 47 (31.8) | 0.56 | 0.87 (0.53, 1.41) | 896/3,322 (26.9) | 866/2,888 (30.0) | <0.01 | 1.16 (1.04, 1.29) |
Chorioamnionitis | 19/146 (13.0) | 46/146 (31.5) | <0.01 | 3.08 (1.70, 5.58) | 494/3,271 (15.1) | 467/2,652 (17.6) | <0.01 | 1.20 (1.05, 1.38) |
Antenatal steroids use | 80/146 (54.8) | 97/147 (66.0) | 0.05 | 1.6 (0.998, 2.57) | 1,446/3,320 (43.6) | 1,474/2,827 (52.1) | <0.01 | 1.41 (1.28, 1.56) |
Gestational age (weeks) | 28.2 ± 3.6 | 28.4 ± 3.2 | 0.67 | 0.19 (−0.58, 0.98) | 28.4 ± 3.2 | 28.3 ± 3.2 | 0.82 | −0.02 (−0.14, 0.18) |
Birth weight (grams) | 1,001.2 ± 323.9 | 991.7 ± 322.3 | 0.8 | −9.53 (−83.6, 64.5) | 1,027.2 ± 303.6 | 1,032.7 ± 301.7 | 0.47 | 5.53 (−9.53, 20.59) |
Birth length (cm) | 34.8 ± 4.1 | 34.4 ± 4.5 | 0.45 | −0.38 (−1.39, 0.62) | 35.3 ± 4.0 | 35.3 ± 4.2 | 0.85 | 0.02 (−0.19, 0.23) |
Missing | 4 | 1 | Â | Â | 232 | 158 | Â | Â |
Head circumference (cm) | 25.2 ± 2.7 | 25.4 ± 3.3 | 0.5 | 0.24 (−0.46, 0.95) | 25.6 ± 2.8 | 25.6 ± 2.9 | 0.9 | −0.01 (−0.16, 0.14) |
Missing | 8 | 1 | Â | Â | 296 | 188 | Â | Â |
Gender (male) | 80 (54.8) | 72 (48.7) | 0.29 | 0.78 (0.49, 1.24) | 1,670/3,322 (50.3) | 1,505/2,911 (51.7) | 0.26 | 1.06 (0.96, 1.17) |
Outborn | 9 (6.2) | 5 (3.4) | 0.26 | 0.53 (0.17, 1.63) | 245 (7.4) | 225 (7.7) | 0.6 | 1.05 (0.87, 1.27) |
Vertex presentation | 95/146 (65.1) | 100/144 (69.4) | 0.42 | 1.22 (0.75, 1.99) | 2,258/3,309 (68.2) | 1,859/2,658 (70.0) | 0.15 | 1.08 (0.97, 1.21) |
Cesarean section | 110 (75.3) | 105 (70.9) | 0.39 | 0.80 (0.48, 1.34) | 2,502 (75.3) | 2,268 (77.9) | 0.02 | 1.15 (1.03, 1.30) |
Apgar score < 7 at 5 min | 36/145 (24.8) | 36/148 (24.3) | 0.92 | 0.97 (0.57, 1.66) | 801/3,219 (24.9) | 682/2,863 (23.8) | 0.33 | 0.94 (0.84, 1.06) |