Table 1

Characteristics of the 1996 and 2003/04 cohorts

CharacteristicCohort; no. (%) of patients*p value
1996, n = 2832003/04, n = 367
Age, yr, mean (range)67.4 (36–95)67.8 (32–92)0.70
Sex0.30
 Female117 (41.3)137 (37.3)
 Male166 (58.6)230 (62.6)
Distance from anal verge< 0.001
 Distal (< 5 cm)56 (19.7)119 (32.4)
 Mid (5–10 cm)129 (45.5)153 (41.6)
 Upper (> 10 cm)98 (34.6)95 (25.8)
Type of resection0.65
 Anterior and Hartmann181 (63.9)241 (65.6)
 Abdominoperineal102 (36.0)126 (34.3)
Stage0.06
 195 (33.5)111 (30.2)
 299 (34.9)108 (29.4)
 389 (31.4)148 (40.3)
Circumferential resection margin< 0.001
 Positive12 (4.2)37 (10.0)
 Negative118 (41.6)319 (86.9)
 Unknown153 (54.0)11 (2.9)
Radiotherapy< 0.001
 None179 (63.2)130 (35.4)
 Preoperative10 (3.5)197 (53.6)
 Postoperative94 (33.2)40 (10.8)
  • * Unless otherwise indicated.