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Table 3 Rate of adverse outcomes following transfusion with fresher or older blood, results from generalised propensity score analyses

From: Use of propensity score methods to address adverse events associated with the storage time of blood in an obstetric population: a comparison of methods

  Crude rate (95 % CI) Matched rate (95 % CI) Stratified rate (95 % CI) Weighted rate (95 % CI) Regression rate (95 % CI)
Severe morbidity
 Freshest 5.50 (3.41, 8.69) 4.03 (3.13, 5.16) 5.80 (3.12, 8.48) 5.11 (3.00, 8.45) 5.97 (2.02, 18.87)
 2nd decile 3.14 (1.70, 5.61)   2.74 (1.22, 4.26) 4.45 (2.64,7.32) 4.22 (2.25, 7.94)
 3rd decile 2.82 (1.41,5.35)   2.31 (0.63, 3.99) 2.11 (0.89, 4.52) 3.64 (2.17, 6.14)
 4th decile 4.87 (2.64,8.60)   5.09 (2.36, 7.82) 5.64 (3.18, 9.66) 3.54 (2.29, 5.46)
 5th decile 4.14 (2.47,6.78)   4.27 (2.2, 6.35) 4.16 (2.46, 6.85) 3.59 (2.41, 5.32)
 6th decile 4.21 (2.41, 7.13)   4.11 (1.74, 6.48) 4.11 (2.29, 7.12) 3.65 (2.44, 5.44)
 7th decile 2.76 (1.31, 5.44)   2.96 (0.66, 5.27) 2.71 (1.24, 5.52) 3.6 (2.21, 5.87)
 8th decile 2.83 (1.26, 5.85)   2.63 (0.17, 5.09) 3.83 (1.90, 7.28) 3.38 (1.79, 6.54)
 9th decile 3.72 (2.07, 6.45)   3.1 (−2.40, 8.6) 2.10 (0.87, 4.59) 2.86 (1.23, 7.16)
 Oldest 3.14 (1.49, 6.17) 3.42 (2.61, 4.48) 1.98 (−2.17, 6.13) 1.36 (0.23, 4.30) 1.83 (0.47, 8.54)
Readmission/transfer
 Freshest 14.56 (11.04, 18.95) 14.16 (12.48, 16.03) 14.86 (10.72, 18.99) 19.33 (15.08, 24.41) 12 (6.40, 23.47)
 2nd decile 15.14 (11.75, 19.29)   14.94 (11.20, 18.68) 14.68 (11.24, 18.94) 13.96 (10.23, 18.99)
 3rd decile 12.23 (9.05, 16.30)   12.54 (9.03, 16.05) 13.66 (10.22, 18.01) 14.18 (11.03, 18.12)
 4th decile 13.27 (9.42, 18.36)   13.42 (9.01, 17.84) 13.75 (9.74, 19.02) 14.29 (11.6, 17.49)
 5th decile 15.19 (11.84, 19.27)   15.39 (11.71, 19.06) 15.31 (11.90, 19.47) 14.48 (11.99, 17.39)
 6th decile 15.21 (11.61, 19.66)   14.73 (10.50, 18.95) 14.52 (10.91, 19.05) 14.83 (12.26, 17.84)
 7th decile 13.45 (9.97, 17.88)   14.07 (9.51, 18.64) 13.72 (10.10, 18.37) 15.19 (12.12, 18.89)
 8th decile 15.79 (11.74, 20.89)   16.23 (9.92, 22.54) 18.19 (13.70, 23.74) 15.35 (11.55, 20.19)
 9th decile 14.24 (10.83, 18.50)   14.48 (5.33, 23.63) 14.63 (11.00, 19.18) 15.08 (10.54, 21.4)
 Oldest 14.51 (10.68, 19.39) 14.63 (12.93, 16.52) 13.86 (1.81, 25.91) 10.74 (7.12, 15.82) 13.29 (7.70, 22.62)