Table 1.
Characteristics of patients with rectal cancer
| Variables | No. of case/mean ± SD/median (interquartile range) | P value | ||
|---|---|---|---|---|
| Total (N = 110) | APR with probably visible (N = 35) | APR with definitely visible (N = 75) | ||
| Age (year) | 60.22 ± 10.03 | 60.54 ± 8.60 | 60.07 ± 10.68 | 0.818 |
| BMI (kg/m2) | 24.33 ± 3.14 | 23.30 ± 3.12 | 24.81 ± 3.04 | 0.018 |
| Distance of AV-APR (cm) | 9.60 ± 1.22 | NA | 9.60 ± 1.22 | NA |
| Distance from seminal vesicle/uterus to rectum (cm) | 1.28 (0.85,1.81) | 0.70 (0.52, 1.07) | 1.55 (1.13, 2.00) | 0.018 |
| Height of tumor measured by MRI (cm) | 6.89 ± 2.53 | 6.75 ± 2.26 | 6.94 ± 2.65 | 0.706 |
| Height of tumor measured by colonoscopy (cm) | 7.00 (5.00,10.00) | 6.00 (5.00, 8.00) | 7.00 (5.00,10.00) | 0.288 |
| Sex | ||||
| Male | 65 (59.1%) | 22 (20.0%) | 43 (39.1%) | 0.583 |
| Female | 45 (40.9%) | 13 (11.8%) | 32 (29.1%) | |
| Degree of bladder filling | ||||
| Filling | 44 (40.0%) | 10 (9.1%) | 34 (30.9%) | 0.095 |
| Not-filling | 66 (60.0%) | 25 (22.7%) | 41 (37.3%) | NA |
| Pelvic effusion | ||||
| Yes | 19 (17.3%) | 2 (1.8%) | 17 (15.5%) | 0.028 |
| No | 91 (82.7%) | 33 (30.0%) | 58 (52.7%) | NA |
| Orientation of uterus (N = 45) | ||||
| Anteversion | 33 (73.3%) | 9 (20.0%) | 24 (53.3%) | 0.692 |
| Retroverted | 12 (26.7%) | 4 (8.9%) | 8 (17.8%) | NA |
| T stage | ||||
| T1 | 7 (6.3%) | 3 (2.7%) | 4 (3.6%) | 0.830 |
| T2 | 23 (20.9%) | 7 (6.4%) | 16 (14.5%) | NA |
| T3 | 79 (71.8%) | 25 (22.7%) | 54 (49.1%) | NA |
| T4 | 1 (0.09%) | 0 (0.0%) | 1 (0.09%) | NA |
APR, anterior peritoneal reflection; AV, anal verge; SD, standard deviation; BMI, body mass index