Table 1.
Characteristics of cohort participants
| Patient factors | n | % | |
|---|---|---|---|
| Sex | Male | 305 | 51.8 |
| Female | 284 | 48.2 | |
| Age | 25–54 yrs | 98 | 16.6 |
| 55–64 yrs | 154 | 26.2 | |
| 65–74 yrs | 186 | 31.6 | |
| 75+ yrs | 151 | 25.6 | |
| Ethnicity* | Maori | 285 | 51.6 |
| Non-Maori | 304 | 48.4 | |
| NZDep | 1–2 | 59 | 10.0 |
| 3–4 | 79 | 13.4 | |
| 5–6 | 111 | 18.9 | |
| 7–8 | 159 | 27.0 | |
| 9–10 | 181 | 30.7 | |
| Smoking | Non-smoker | 234 | 39.7 |
| Ex-smoker | 232 | 39.4 | |
| Smoker | 123 | 20.9 | |
| Disease factors | n | % | |
| Stage | I | 76 | 12.9 |
| II | 183 | 31.1 | |
| III | 190 | 32.3 | |
| IV | 140 | 23.8 | |
| Grade | Well-differentiated | 57 | 9.7 |
| Moderately | 424 | 72.0 | |
| Poorly | 108 | 18.3 | |
| Site | Right | 239 | 40.6 |
| Left | 220 | 37.4 | |
| Rectosigmoid | 99 | 16.8 | |
| Synchronous | 31 | 5.3 | |
| Comorbidities | n | % | |
| Angina | 72 | 12.2 | |
| Hypertension | 224 | 38.0 | |
| Previous MI | 49 | 8.3 | |
| Cardiac arrhythmias | 79 | 13.4 | |
| CHF | 62 | 10.5 | |
| PVD | 24 | 4.1 | |
| Chronic respiratory disease | 129 | 21.9 | |
| GI ulcer disease | 24 | 4.1 | |
| Other cancer | 27 | 4.6 | |
| Cerebrovasc disease | 41 | 7.0 | |
| Diabetes (all) | 95 | 16.1 | |
| Renal disease (all) | 31 | 5.3 | |
| Other neurological | 39 | 6.6 | |
| Charlson comorbidity index score | O | 284 | 48.2 |
| 1–2 | 240 | 40.8 | |
| 3+ | 65 | 11.0 | |
| Number of conditions** | 0 | 181 | 30.7 |
| 1 | 147 | 25.0 | |
| 2 | 117 | 19.9 | |
| 3+ | 144 | 24.5 | |
*Maori purposively oversampled
**Included all conditions included in Charlson Comorbidity Index as well as angina, hypertension, cardiac arrhythmias, previous pulmonary embolism, cardiac valve disease, inflammatory bowel disease, other neurological conditions (including multiple sclerosis, Parkinson's disease, epilepsy) and major psychiatric conditions (including schizophrenia, bipolar disease and depressive psychosis)