Table 1.
Clinic-pathological characteristics and operative data according to age grouping for the 225 patients under study, n (%)
| Age group | ||||
| Group A | Group B | Group C | P value | |
| (n = 112) | (n = 57) | (n = 56) | ||
| Age, yrb | 57.1 (18-65) | 68.9 (65.5-74.2) | 80 (75-91.6) | |
| Male sex | 62 (55.4) | 35 (61.4) | 24 (42.9) | NS |
| BMI, Kg/m2 | 25 (3.8) | 25.6 (3.7) | 24.9 (3.2) | NS |
| ASA classificationb | < 0.001 | |||
| I | 23 (20.5) | 2 (3.5) | 1 (1.8) | |
| II | 84 (75) | 41 (71.9) | 36 (64.3) | |
| III | 5 (4.5) | 14 (24.6) | 19 (33.9) | |
| Indication for surgeryb | 0.007 | |||
| Colon cancer | 46 (41.1) | 37 (64.9) | 37 (66.1) | |
| Rectal cancer | 32 (28.6) | 5 (8.8) | 8 (14.3) | |
| Benign | 34 (29.4) | 15 (26.4) | 11 (19.7) | |
| Presence of comorbiditiesb | < 0.001 | |||
| None | 48 (42.9) | 12 (21.1) | 8 (14.3) | |
| 1 | 41 (36.6) | 18 (31.6) | 15 (26.8) | |
| ≥ 2 | 23 (20.5) | 27 (47.4) | 33 (58.9) | |
| Previous surgery | 49 (43.7) | 33 (57.9) | 31 (55.4) | NS |
| R0 resection | 75 (96.2) | 42 (100) | 45 (100) | NS |
| TNM Stage | NS | |||
| Stage ≤ II | 53 (67.9) | 28 (66.7) | 36 (80) | |
| Stage III | 23 (29.5) | 11 (26.2) | 19 (20) | |
| Stage IV | 2 (2.6) | 3 (7.1) | - | |
| Extent of surgery | NS | |||
| Right hemicolectomy | 26 (23.2) | 19 (33.3) | 23 (41.1) | |
| Left hemicolectomy | 46 (41) | 28 (49.2) | 21 (37.5) | |
| Rectal resections1 | 32 (28.6) | 5 (8.8) | 8 (14.3) | |
| Abdominoperineal resection | 6 (5.4) | 1 (1.7) | - | |
| Others | 2 (1.8) | 4 (7) | 4 (7.1) | |
| Stoma formation | NS | |||
| Ileostomy | 20 (17.9) | 2 (3.6) | 5 (8.9) | |
| Colostomy | 6 (5.4) | 1 (1.8) | 1 (1.8) | |
| Time of surgery, min | 235 (125-360) | 216 (145-340) | 220 (125-320) | NS |
| Estimated blood loss, mL | 50 (20-400) | 40 (10-400) | 50 (20-250) | NS |
| Conversion to open surgery | 2 (1.8) | 4 (7) | 2 (3.6) | NS |
1
Includes extended resections to the upper rectum, anterior resection, low anterior resection and intersphincteric resection. Data are expressed as number of patients (%), mean (standard deviation) or median (range).
b
P < 0.01. BMI: Body mass index; ASA: American Society of Anaesthesiologists.