Table 2 Crude and adjusted rate ratios for length of stay in days, in current and ex-smokers versus non-smokers, by age

<30 (n=3496)

Ex-smoker

1.05 (0.93, 1.19)

0.401

1.04 (0.93, 1.17)

0.469

Current smoker

1.10 (1.02, 1.19)

0.019

0.96 (0.88, 1.06)

0.433

30-39 (n=4523)

Ex-smoker

1.26 (1.11, 1.44)

<0.001

1.14 (1.02, 1.27)

0.022

Current smoker

1.30 (1.19, 1.44)

<0.001

1.02 (0.92, 1.13)

0.711

40-49 (n=2574)

Ex-smoker

1.23 (1.05, 1.45)

0.009

1.18 (1.02, 1.36)

0.025

Current smoker

1.19 (1.05, 1.35)

0.006

1.09 (0.96, 1.25)

0.199

50-59 (n=3794)

Ex-smoker

1.15 (1.04, 1.28)

0.008

1.08 (0.97, 1.20)

0.160

Current smoker

1.20 (1.09, 1.33)

<0.001

1.13 (1.01, 1.26)

0.032

60-69 (n=5407)

Ex-smoker

1.15 (1.07, 1.24)

<0.001

1.12 (1.03, 1.21)

0.005

Current smoker

1.22 (1.12, 1.34)

<0.001

1.20 (1.09, 1.33)

<0.001

70-79 (n=5022)

Ex-smoker

1.12 (1.04, 1.21)

0.002

1.10 (1.02, 1.18)

0.010

Current smoker

1.27 (1.15, 1.40)

<0.001

1.24 (1.13, 1.36)

<0.001

80+ (n=2291)

Ex-smoker

0.95 (0.86, 1.05)

0.343

0.97 (0.87, 1.07)

0.513

Current smoker

1.06 (0.87, 1.30)

0.559

1.08 (0.88, 1.33)

0.478