Table 2 Components and total scores for the Adverse Outcome Index and Weighted Adverse Outcome Score
Variable | Full Sample n = 1,447,073 | WAOS Weights | Total WAOS pointsa | Pre-MOREOB n = 328,864 | During MOREOB n = 556,550 | Post-MOREOB n = 561,659 |
|---|---|---|---|---|---|---|
n(%) | n(%) | n(%) | n(%) | |||
Maternal death | 69 (0.00) | 750 | 51,750 | 14 (0.00) | 30 (0.01) | 25 (0.00) |
Uterine rupture | 516 (0.04) | 100 | 51,600 | 106 (0.03) | 192 (0.03) | 218 (0.04) |
Maternal admission to ICU | 3566 (0.25) | 65 | 231,790 | 714 (0.22) | 1406 (0.25) | 1446 (0.26) |
Unanticipated operative procedure | 11,081 (0.77) | 40 | 443,240 | 2112 (0.64) | 4168 (0.75) | 4801 (0.85) |
Blood transfusion | 7880 (0.54) | 20 | 157,600 | 2069 (0.63) | 3121 (0.56) | 2690 (0.48) |
4th degree tearb | 5187 (0.36) | 5 | 25,935 | 1169 (0.36) | 2128 (0.38) | 1890 (0.34) |
Neonatal death | 12,074 (0.83) | 400 | 4,829,600 | 2613 (0.79) | 4731 (0.85) | 4730 (0.84) |
Birth trauma | 4045 (0.28) | 60 | 242,700 | 1242 (0.38) | 1641 (0.29) | 1162 (0.21) |
NICU admissionc | 61,079 (4.22) | 35 | 2,137,765 | 13,199 (4.01) | 23,584 (4.24) | 24,296 (4.33) |
Adverse Outcome Indexd | 98,789 (6.83) | – | – | 21,898 (6.66) | 38,462 (6.91) | 38,429 (6.84) |
Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |||
Weighted Adverse Outcome Score | 4.86 (4.3) | – | – | 4.52 (4.50) | 5.05 (4.15) | 4.97 (4.27) |
Maternal age | 28.86 (4.21) | – | – | 27.43 (6.17) | 29.06 (3.70) | 29.83 (1.56) |
Maternal comorbidity index | 0.48 (0.18) | – | – | 0.41 (0.20) | 0.49 (0.17) | 0.53 (0.17) |
Gestational age of infant at birth in weeks | 38.8 (2.0) | – | – | 38.9 (2.0) | 38.8 (2.1) | 38.8 (2.1) |