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Table 2 Mean (O-E)/N for hospital surfactant use and death

From: Assessment of surfactant use in preterm infants as a marker of neonatal intensive care unit quality

Hospital Surfactant use Mean (95% CI) p-value Death Mean (95% CI) p-value
A 0.102 (0.082,0.122) <0.001* -0.130 (-0.166,-0.092) <0.001*
B 0.196 (0.079,0.308) 0.010 0.011 (-0.004, 0.026) 0.219
C 0.131 (0.088,0.173) <0.001* 0.003 (-0.006,0.012) 0.573
D 0.118 (0.065,0.172) <0.001* -0.004 (-0.014,0.006) 0.496
E 0.030 (-0.020,0.082) 0.312 0.00 (-0.012,0.011) 0.999
F 0.048 (0.026,0.071) <0.001* -0.017 (-0.021,-0.013) <0.001*
G 0.043 (-0.031,0.114) 0.319 0.004 (-0.009,0.017) 0.534
H 0.027 (-0.086,0.137) 0.700 -0.005 (-0.024,0.015) 0.712
I 0.013 (-0.038,0.064) 0.659 -0.009 (-0.018,0.001) 0.129
J -0.035 (-0.087,0.016) 0.265 0.013 (0.004,0.022) 0.001*
K -0.065 (-0.113,-0.018) 0.020 -0.001 (-0.010,0.008) 0.845
L -0.117 (-0.177,-0.057) 0.001* 0.002 (-0.008,0.011) 0.771
M -0.164 (-0.240,-0.087) <0.001* 0.006 (-0.010,0.022) 0.536
N -0.192 (-0.269,-0.111) <0.001* 0.008 (-0.006,0.023) 0.472
O -0.298 (-0.337,-0.258) <0.001* 0.033 (0.023,0.044) <0.001*
P -0.350 (-0.436,-0.260) <0.001* 0.027 (0.004,0.051) 0.041
  1. *significant with p ≤ 0.05 after Bonferoni correction (p ≤ 0.05/16 = 0.003)