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Table 1 Polyps in the two groups

From: The clinical features of chronic intestinal schistosomiasis-related intestinal lesions

  Patients with schistosomiasis Patients without P valuea
schistosomiasis (N = 248) schistosomiasis (N = 992)
Gender male/female 183/65 732/260  
Age 60.5 ± 12.2 57.8 ± 11.6 0.164
Polyps 160 (64.5%) 425 (42.8%)  < 0.001
 Male/female 123 (67.2%)/37 (56.9%) 333 (45.5%)/92 (35.4%)  < 0.001/0.002
 20–53 y 41 (55.4%) 113 (33.6%)  < 0.001
 54–62 y 38 (66.7%) 122 (48.0%) 0.011
 63–70 y 40 (65.6%) 134 (46.7%) 0.007
 71–89 y 41 (73.2%) 56 (48.7%) 0.002
Site of polyps
 Ileocecal junction 13 (8.1%) 28 (6.6%) 0.516
 Ascending colon 23 (14.4%) 70 (16.5%) 0.537
 Transverse colon 43 (26.9%) 122 (28.7%) 0.661
 Descending colon 31 (19.4%) 113 (26.6%) 0.071
 Sigmoid colon 78 (48.8%) 224 (52.7%) 0.393
 Rectum 100 (62.5%) 206 (48.5%) 0.002
 Single/multiple segments 75 (46.9%)/85 (53.1%) 227 (53.4%)/198 (46.6%) 0.158
Number of polyps 2 (1–5) 2 (1–5) 0.153
 Male/female 3 (1–7)/2 (1–3.25) 2 (1–6)/1 (1–3) 0.287/0.173
 20–53 y 2 (1–4) 2 (1–3.5)) 0.482
 54–62 y 3 (2–6) 2 (1–5) 0.050
 63–70 y 2 (1–8) 2 (1–6) 0.621
 71–89 y 3 (1–4.5) 3 (1–6) 0.686
Multiple polyps 115 (71.9%) 272 (64.0%) 0.073
 20–53 y 24 (58.5%) 63 (55.8%) 0.758
 54–62 y 30 (78.9%) 77 (63.1%) 0.070
 63–70 y 31 (77.5%) 93 (69.4%) 0.321
 71–89 y 30 (73.2%) 39 (69.6%) 0.705
Morphology (n1 = 537, n2 = 1421)
 Is 141 (26.3%) 456 (32.1%) 0.012
 Ip 7 (1.3%) 50 (3.5%) 0.009
 Isp 14 (2.6%) 42 (3.0%) 0.680
 IIa 368 (68.5%) 862 (60.7%) 0.001
 IIb 4 (0.7%) 8 (0.6%) 0.746
 IIc 0 (0.0%) 0 (0.0%) /
 LST 3 (0.6%) 3 (0.4%) 0.401
Size (n1 = 662, n2 = 1639)
 1–5 mm 597 (90.2%) 1451 (88.5%) 0.252
 6–9 mm 48 (7.3%) 122 (9.4%) 0.873
 10–19 mm 13 (2.0%) 53 (3.2%) 0.099
  ≥ 20 mm 4 (0.6%) 13 (0.8%) 0.632
Pathology (n1 = 249, n2 = 487)
 Serrated lesions and polyps 112 (45.0%) 244 (50.1%) 0.188
  Hyperplastic polyp 111 (99.1%) 240 (98.4%) 1.000
  Traditional serrated adenoma 1 (0.9%) 2 (0.8%) 1.000
  Serrated lesions with dysplasia 0 (0.0%) 2 (0.8%) 0.552
 Traditional adenoma 137 (55.0%) 243 (49.9%) 0.188
  Tubular adenoma 125 (91.2%) 223 (91.8%) 0.859
  villous adenoma 1 (0.7%) 2 (0.8%) 1.000
  Tubulovillous adenoma 11 (8.0%) 18 (7.4%) 0.826
  Number of adenomas 2 (1–4) 2 (1–3) 0.225
  Male/female 3 (1–4)/1 (1–2) 2 (1–3)/1 (1–1) 0.210/0.496
  1. aUse student's t test to compare the age of the two groups. Median and 25th–75th percentile describe the number of polyps or adenomas in different age groups and gender. Categorical values compared with chi-square test (polyp detection, site of polyps, multiple polyps, morphology, pathology), and Fisher's exact test was used when expected count of one set of samples was less than 5(IIb, LST, ≥ 20 mm, traditional serrated adenoma, serrated lesions with dysplasia, villous adenoma)