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Table 6 Logistic regression for odds of death and complications without and with risk adjustment using POSSUM mortality and morbidity score

From: Risk adjustment is crucial in comparing outcomes of various surgical modalities in patients with ileal perforation

Group

Number of patients (%)

Odds ratio without risk adjustment

(95% CI)

P value

Odds ratio with risk adjustment (95% CI)

P value

Possum mortality score

   

1.06 (1.03 1.09)

0.001

Group II

42 (33.6)

2.43 (0.44 13.35)

0.306

3.4 (0.51 23.60)

0.202

Group III

45 (36)

5.14 (1.05 25.16)

0.043

1.16 (0.17 7.60)

0.875

Possum morbidity score

   

1.10 (1.05 1.15)

0.001

Group II

42

1.14 (0.41 3.14)

0.796

1.46 (0.44 4.8)

0.53

Group III

45

2.32 (0.14 0.75)

0.141

0.41 (0.09 1.83)

0.24