Table 1 Baseline demographics and clinicopathological characteristics of the study population
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) | - | - |