Table 4 Impact of possible determinants on the occurrence of postdischarge adverse outcomes (that required readmission): odds ratios (OR) and 95% confidence intervals (95% CI) (Leiden University Medical Centre, surgical patient admissions during 2003)
DeterminantsPostdischarge adverse outcomes OR (95% CI)Postdischarge adverse outcomes that required readmission OR (95% CI)
Age 65 or older at admission1.19 (0.93 to 1.51)0.99 (0.67 to 1.47)
Male gender1.01 (0.82 to 1.26)1.49 (1.03 to 2.14)
ASA class of 1st operation ⩾31.18 (0.88 to 1.60)1.35 (0.85 to 2.17)
maximum complexity class of 1st operation ⩾51.36 (1.02 to 1.82)1.73 (1.09 to 2.74)
In-hospital adverse outcomes1.43 (1.05 to 1.94)1.59 (1.01 to 2.52)
Duration of admission 10 days or longer1.05 (0.79 to 1.38)1.68 (1.10 to 2.57)
Surgery group*
    Head–neck surgery0.64 (0.29 to 1.44)0.14 (0.02 to 1.13)
    Vascular surgery0.74 (0.39 to 1.39)0.32 (0.12 to 0.86)
    Digestive tract surgery1.29 (0.95 to 1.76)0.63 (0.38 to 1.03)
    Musculoskeletal system1.00 (0.71 to 1.40)0.43 (0.24 to 0.78)
    Breast surgery1.96 (1.15 to 3.34)0.53 (0.16 to 1.82)
    Procedures from other groups0.99 (0.63 to 1.55)0.45 (0.21 to 1.00)
    Procedures from multiple groups1.68 (1.10 to 2.56)0.81 (0.42 to 1.55)
Model fit: Nagelkerke R20.0310.061

  • Odds ratios in bold indicate odds ratios significantly different from 1.

  • *Reference group: no procedures performed in the operating centre.