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| Patient variables | All patients (n = 85) | Normal step count (> 2500 steps, n = 68, 80%) | Low step count (< 2500 steps, n = 17, 20%) | Odds ratio (95% CI) | p value |
|---|
| Age (years) |
| Median (IQR) | 76 (72–81) | 75 (70–81) | 78 (76–81) | 1.07 (0.97–1.19) | 0.16 |
| Sex (n, %) |
| Female | 43 (50.6) | 37 (54.4) | 6 (35.3) | Ref | |
| Male | 42 (49.4) | 31 (45.6) | 11 (64.7) | 2.55 (0.80–9.06) | 0.13 |
| Ethnicity (n, %) |
| NZ European | 78 (91.8) | 62 (91.2) | 16 (94.1) | Ref | |
| Maori | 3 (3.5) | 3 (4.4) | 0 | - | |
| Other | 4 (4.7) | 3 (4.4) | 1 (5.9) | 1.17 (0.05–14.3) | 0.91 |
| BMI kg/m2 |
| Median (IQR) | 27.0 (24.5–32.1) | 27.3 (24.9–33.0) | 26.9 (23.9–30.0) | 0.98 (0.89–1.09) | 0.79 |
| BMI categorized (n, %) |
| Normal | 23 (27.1) | 16 (23.5) | 7 (41.2) | 2.27 (0.72–6.94) | 0.15 |
| Underweight | 2 (2.4) | 2 (2.9) | 0 | - | - |
| Overweight | 32 (37.6) | 28 (41.2) | 4 (23.5) | 0.44 (0.11–1.39) | 0.19 |
| Obese | 28 (32.9) | 22 (32.4) | 6 (35.3) | 1.14 (0.35–3.41) | 0.82 |
| ASA (n, %) |
| 1–2 | 43 (50.6) | 39 (57.4) | 4 (23.5) | Ref | |
| 3–4 | 42 (49.4) | 29 (42.6) | 13 (76.5) | 3.54 (0.99–14.9) | 0.06 |
| Tumour location (n, %) |
| Colon | 62 (72.9) | 49 (72.1) | 13 (76.5) | Ref | |
| Rectum | 23 (27.1) | 19 (27.9) | 4 (23.5) | 0.63 (0.15–2.32) | 0.51 |
| Access (n, %) |
| Laparoscopic | 46 (54.1) | 42 (61.8) | 4 (23.5) | Ref | |
| Open | 39 (45.9) | 26 (38.2) | 13 (76.5) | 5.20 (1.57–21.0) | 0.01 |
| AJCC stage (n, %) |
| I–II | 61 (71.8) | 50 (73.5) | 11 (64.7) | Ref | |
| III–IV | 24 (28.2) | 18 (26.5) | 6 (35.3) | 1.25 (0.69–2.28) | 0.46 |
| Neoadjuvant treatment (n, %) |
| None | 69 (81.2) | 57 (83.8) | 12 (70.6) | Ref. | |
| Short course | 6 (7.1) | 4 (5.9) | 2 (11.8) | 2.38 (0.31–13.7) | 0.35 |
| Long course | 10 (11.7) | 7 (10.3) | 3 (17.6) | 2.04 (0.40–8.56) | 0.35 |
| Modified frailty index (n, %) |
| < 0.27 | 45 (52.9) | 42 (61.8) | 3 (17.6) | Ref | |
| ≥ 0.27 | 40 (47.1) | 26 (38.2) | 14 (82.4) | 7.15 (1.75–39.0) | 0.01 |
| EFS (n, %) |
| Not frail (≤ 7) | 73 (85.9) | 65 (95.6) | 8 (47.1) | Ref | |
| Frail (≥ 8) | 12 (14.1) | 3 (4.4) | 9 (52.9) | 19.0 (3.68–130) | < 0.01 |
| Living status (n, %) |
| Home | 83 (97.6) | 68 (100.0) | 15 (88.2) | | |
| Care facility | 2 (2.4) | 0 | 2 (11.8) | - | - |
- Patients with a median daily pre-operative step count with < 2500 step/day were classified as having a low step count
