Table 3 Relationships of readmissions within seven and 28 days of discharge from multiday elective surgery, adjusted for age, sex, Indigenous status, and LOS (reference group non-smokers)

Ex-smoker

1.48 (1.31, 1.67)

<0.001

1.29 (1.13, 1.47)

<0.001

1.72 (1.58, 1.87)

<0.001

1.35 (1.23, 1.49)

<0.001

Current smoker

1.50 (1.31, 1.72)

<0.001

1.37 (1.19, 1.59)

<0.001

1.79 (1.63, 1.96)

<0.001

1.53 (1.39, 1.69)

<0.001

Age group (ref <30)

 30-39

0.98 (0.79, 1.22)

0.890

0.94 (0.80, 1.11)

0.485

 40-49

0.91 (0.71, 1.17)

0.464

1.33 (1.12, 1.58)

0.001

 50-59

1.01 (0.81, 1.26)

0.934

1.31 (1.12, 1.55)

0.001

 60-69

1.01 (0.82, 1.25)

0.890

1.35 (1.16, 1.57)

<0.001

 70-79

0.95 (0.77, 1.18)

0.667

1.28 (1.09, 1.49)

0.002

 >80

1.06 (0.83, 1.36)

0.631

1.50 (1.26, 1.79)

<0.001

Female

0.81 (0.72, 0.92)

0.001

0.78 (0.72, 0.85)

<0.001

Indigenous

0.80 (0.72, 0.92)

0.166

0.90 (0.74, 1.13)

0.390

Admission > 3 days (ref ≤ 3 days)

1.63 (1.46, 1.83)

<0.001

1.65 (1.50, 1.75)

<0.001