Table 1.
Baseline characteristics of patients included in the study according to body mass indexa
|
Characteristics |
All cases |
Normal weight |
Overweight |
P |
|---|---|---|---|---|
| (BMI <23 kg/m2) | (BMI ≥23 kg/m2) | |||
| No. of patients (%) |
525 (100%) |
208 (39.6%) |
317 (60.4%) |
|
| Mean age (±SD), years |
63.2 ± 11.7 |
64.5 ± 12.4 |
62.4 ± 11.1 |
0.003 |
| Males, n (%) |
310 (59%) |
113 (36.5.0%) |
197 (63.5%) |
0.075 |
| Diabetes, n (%) |
86 (16.4%) |
25 (12.0%) |
61 (19.2%) |
0.029 |
| Alcohol consumption, n (%) |
129 (24.6%) |
41 (19.7%) |
88 (27.8%) |
0.036 |
| Smoking, n (%) |
160 (30.5%) |
61 (29.3%) |
99 (31.2%) |
0.643 |
| CEA ≥5 ng/ml, n (%) |
215 (41.0%) |
87 (41.8%) |
128 (40.4%) |
0.741 |
| Site, n (%) |
|
|
|
3.6 × 10–4 |
| Rectum |
287 (54.7%) |
98 (47.1%) |
189 (59.6%) |
|
| Distal colon |
116 (22.1%) |
43 (20.7%) |
73 (23.0%) |
|
| Proximal colon |
122 (23.2%) |
67 (32.2%) |
55 (17.4%) |
|
| Tumor size, n (%) |
|
|
|
0.513 |
| <5 cm |
332 (63.2%) |
128 (62.5%) |
204 (64.4%) |
|
| ≥5 cm |
193 (36.8%) |
80 (38.5%) |
113 (35.6%) |
|
| Pathological type, n (%) |
|
|
|
0.166 |
| Adenocarcinoma |
462 (88.0%) |
178 (85.6%) |
284 (89.6%) |
|
| others |
63 (12.0%) |
30 (14.4%) |
33 (10.4%) |
|
| Differentiation, n (%) |
|
|
|
0.764 |
| Well/moderate |
436 (83.0%) |
174 (83.7%) |
262 (82.6%) |
|
| Poor |
89 (17.0%) |
34 (16.3%) |
55 (17.4%) |
|
| Mean nodes analyzed (±SD) |
13.6 ± 8.2 |
14.8 ± 9.0 |
12.9 ± 7.6 |
0.007 |
| Lymph node-positive, N (%) |
225 (42.9%) |
79 (38.0%) |
146 (46.1%) |
0.067 |
| Stage, n (%) |
|
|
|
0.008 |
| I |
83 (15.8%) |
26 (12.5%) |
57 (18.0%) |
|
| II |
192 (36.6%) |
90 (43.3%) |
102 (32.2%) |
|
| III |
165 (31.4%) |
53 (25.5%) |
112 (35.3%) |
|
| IV | 85 (16.2%) | 39 (18.8%) | 46 (14.5%) |
aBMI, body mass index; CEA, carcinoembryonic antigen.