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Table 1 Preoperative characteristics of the patients and tumors

From: Clinical efficacy of different approaches for laparoscopic intersphincteric resection of low rectal cancer: a comparison study

  TPAISR
n = 57 (%)
TAISR
n = 142 (%)
PAISR
n = 36 (%)
P value
Gender 0.854
 Male 32 (56.1) 76 (53.5) 21 (58.3)  
 Female 25 (43.9) 66 (46.5) 15 (41.7)  
Age, median (IQR), years 52 54 (46, 62) 58 0.059
BMI, median (IQR) 23.2 22.2 21.8 0.032
0.021a
0.527b
0.024c
ASA score 0.223
 I 40 (70.2) 89 (62.7) 17 (47.2)  
 II 12 (21.2) 43 (30.3) 15 (41.7)  
 III 5 (8.8) 10 (7.0) 4 (11.1)  
Tumor height, median (IQR), cm 4.0 5.0 3.8 < 0.001
< 0.001a
< 0.001b
0.431c
Previous abdominal surgery 0.291
 No 48 (84.2) 125 (88.0) 28 (84.2)  
 Yes 9 (15.8) 17 (12.0) 8 (22.2)  
Tumor size, median (IQR), cm 2.5 2.5 (1.8, 3.0) 2.0 (2.0, 3.0) 0.440
LCIT (%) 0.002
 < 50 21 (36.8) 83 (58.5) 26 (72.2) 0.130b
 ≥ 50 36 (63.2) 59 (41.5) 10 (27.8) 0.001c
CEA (ng/ml) 0.272
 ≤ 5.0 46 (80.7) 110 (77.5) 24 (66.7)  
 > 5.0 11 (19.3) 32 (22.5) 12 (33.3)  
CA199 (u/ml) 0.076
 ≤ 37.0 51 (89.5) 126 (88.7) 27 (75.0)  
 > 37.0 6 (10.5) 16 (11.3) 9 (25.0)  
Neoadjuvant CRT 0.111
 No 11 (19.3) 48 (33.8) 9 (25.0)  
 Yes 46 (80.7) 94 (66.2) 27 (75.0)  
Preoperative T category 0.116
 T1 14 (24.6) 40 (28.2) 3 (8.3)  
 T2 23 (40.4) 64 (45.1) 21 (58.4)  
 T3 13 (35.0) 38 (26.8) 12 (33.3)  
Preoperative baseline Wexner scores 1 (0–3) 1 (0–3) 1 (0–3) 0.681
  1. Data are reported as the median and percentile (25th–75th) or n (%)
  2. CRT chemoradiotherapy, BMI body mass index, LCIT luminal circumference of the tumor, IQR interquartile range
  3. aTPAISR group compared with the TAISR group
  4. bTAISR group compared with the PAISR group
  5. cTPAISR group compared with the PAISR group