n(%) | Median time to readmission (days) | Hazard ratio and 95% CI | |||||
---|---|---|---|---|---|---|---|
Univariate model | Multivariate model* | ||||||
*Cox gamma frailty model adjusted for all the variables in the table. †Results only for rectal cancer. ‡Given the correlation between radiotherapy treatment and tumour site we have combined them into a variable: hazard ratio for rectum cancer with and without radiotherapy and referring to colon cases without radiotherapy treatment. §Distribution for all readmissions to hospital. NA, not available. | |||||||
Sex | |||||||
Female | 164 (40.7) | 1427 | 1 | 1 | |||
Male | 239 (59.3) | 799 | 1.61 | (1.21,2.15) | 1.52 | (1.17,1.96) | |
Age | |||||||
<60 | 111 (27.5) | 799 | 1 | 1 | |||
60–74 | 194 (48.1) | 1230 | 0.84 | (0.61,1.16) | 0.90 | (0.66,1.21) | |
⩾75 | 98 (24.3) | 1188 | 0.85 | (0.57,1.26) | 1.06 | (0.70,1.60) | |
p for trend: 0.360 | p for trend: 0.760 | ||||||
Tumour site | |||||||
Colon | 252 (62.5) | 1116 | 1 | ||||
Rectum | 151 (37.5) | 1022 | 1.16 | (0.88,1.54) | |||
Dukes’s stage | |||||||
A–B | 180 (44.7) | 2175 | 1 | 1 | |||
C | 148 (36.7) | 1073 | 1.49 | (1.12,1.99) | 1.15 | (0.85,1.56) | |
D | 75 (18.6) | 199 | 3.37 | (2.39,4.75) | 1.78 | (1.20,2.64) | |
p for trend: <0.001 | p for trend: <0.001 | ||||||
Chemotherapy | |||||||
No | 217 (53.8) | 1427 | 1 | 1 | |||
Yes | 186 (46.2) | 734 | 1.42 | (1.08,1.86) | 1.34 | (0.96,1.86) | |
Radiotherapy† | |||||||
No | 77 (51.0) | 1188 | 1 | 1.23‡ | (0.88,1.72) | ||
Yes | 74 (49.0) | 589 | 1.25 | (0.79,1.96) | 1.41‡ | (1.00,1.99) | |
Distance | |||||||
⩽30 km | 381 (94.8) | 1073 | 1 | 1 | |||
>30 km | 21 (5.2) | 1128 | 1.01 | (0.68,1.62) | 1.07 | (0.72,1.59) | |
Mortality | |||||||
No | 293 (72.7) | 1736 | 1 | 1 | |||
Yes | 110 (27.3) | 218 | 3.21 | (2.46,4.19) | 2.24 | (1.66,3.02) | |
Educational level | |||||||
Less than primary | 176 (43.7) | 819 | 1 | 1 | |||
Primary | 177 (43.9) | 1188 | 1.12 | (0.84,1.50) | 0.92 | (0.70,1.20) | |
Secondary | 36 (8.9) | NA | 0.87 | (0.53,1.45) | 0.62 | (0.38,1.01) | |
University | 14 (3.5) | 227 | 2.77 | (1.44,5.32) | 1.64 | (0.92,2.92) | |
p for trend: 0.042 | p for trend: 0.850 | ||||||
Charlson index§ | |||||||
0 | 577 (67.0) | 1 | 1 | ||||
1–2 | 46 (5.3) | 1.66 | (0.90,3.05) | 1.45 | (0.89,2.36) | ||
⩾3 | 250 (27.7) | 2.25 | (1.69,2.99) | 1.31 | (1.01,1.70) | ||
p for trend: <0.001 | p for trend: 0.028 |