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Table 1 Characteristics of cohort participants

From: The effect of comorbidity on the use of adjuvant chemotherapy and survival from colon cancer: a retrospective cohort study

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
  1. *Maori purposively oversampled
  2. **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)