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. 2025 Aug 19;40(1):182. doi: 10.1007/s00384-025-04982-y

Table 3.

Univariate analysis of lymph node harvested

Variable N(%) Total lymph nodes harvested, M (IQR) P value
Group 0.000**
  Non-injection 66(60.6%) 14.0(5)
  Pre-neoadjuvant Injection 22(20.2%) 20.0(7)
  Preoperative injection 21(19.3%) 16.0(5)
Gender 0.637#
  Female 38(34.9%) 15.5(6)
  Male 71(65.1%) 15.0(6)
Age 0.656#
   ≤ 50 28(25.7%) 16.0(7)
   > 50 81(74.3%) 15.0(7)
BMI 0.875**
   < 18.5 kg/m2 2(1.8%) 18.0(-)
  18.5–24.9 kg/m2 81(74.3%) 15.0(7)
  25.0–29.9 kg/m2 23(21.1%) 15.0(4)
   ≥ 30 kg/m2 3(2.8%) 18.0(-)
Comorbidity 0.751#
  No 68(62.4%) 15.0(6)
  Yes 41(37.6%) 16.0(7)
Pre-treatment cT stage 0.687**
  T2 3(2.8%) 14.0(-)
  T3 77(70.6%) 15.0(6)
  T4 29(26.6%) 15.0(7)
Pre-treatment cN stage 0.243**
  N0 5(4.6%) 16.0(9)
  N1 36(33.0%) 14.0(7)
  N2 68(62.4%) 15.5(6)
Tumor distance from anal verge 0.342#
   ≤ 5 cm 74(67.9%) 15.0(5)
   > 5 cm 35(32.1%) 18.0(8)
Surgical approach 0.744#
  Laparoscopy 104(95.4%) 15.0(6)
  Laparotomy 5(4.6%) 14.0(17)
Surgical procedure 0.455**
  Dixon 8(7.3%) 15.0(7)
  Dixon + colostomy 74(67.9%) 15.5(7)
  Harrtmann 1(0.9%) -
  Miles 26(23.9%) 15.0(5)
inferior mesenteric artery ligation level 0.195#
  high 54(49.5%) 15.0(5)
  low 55(50.5%) 18.0(7)
ASA classification 0.656#
  II 94(86.2%) 15.0(7)
  III 15(13.8%) 14.0(5)
pT stage 0.451**
  T0 12(11.0%) 15.5(9)
  T1 5(4.6%) 14.0(5)
  T2 21(19.3%) 15.0(8)
  T3 68(62.4%) 15.0(6)
  T4 3(2.8%) 19.0(-)
pN stage 0.826**
  N0 73(67.0%) 15.0(7)
  N1 28(25.7%) 15.0(6)
  N2 8(7.3%) 15.0(6)
yp TNM stage 0.514**
  0 11(10.1%) 14.0(9)
  I 22(20.2%) 14.5(6)
  II 40(36.7%) 16.0(7)
  III 36(33.0%) 15.0(6)
Differentiation 0.266**
  Low 18(16.5%) 14.0(2)
  Middle 66(60.6%) 16.0(6)
  Unknown 25(22.9%) 17.0(8)
Tumor regression grade 0.863**
  0 11(10.1%) 14.0(9)
  1 34(31.2%) 15.5(9)
  2 49(45.0%) 15.0(6)
  3 15(13.8%) 15.0(6)
Tumor size 0.049#
   ≤ 2 cm 50(45.9%) 14.0(6)
   > 2 cm 59(54.1%) 17.0(7)
Distal margin 0.064#
   ≤ 1.5 cm 63(57.8%) 15.0(7)
   > 1.5 cm 46(42.2%) 17.0(5)
Surgery duration 0.752#
   ≤ 225 min 55(50.5%) 15.0(6)
   > 225 min 54(49.5%) 16.0(7)
Blood loss 0.337#
   < 100 ml 36(33.0%) 15.5(5)
   ≥ 100 ml 73(67.0%) 15.0(7)

**Kruskal–Wallis test

# Mann–Whitney U test