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Table 4 Comparison of the incidence of colorectal cancers with submucosal invasion depth ≥ 1.8 mm between the combinations of horizontal and vertical rigidities under the barium enema examination profile view

From: Role of barium enema examination for the diagnosis of submucosal invasion depth in T1 colorectal cancers

145 lesions Positive for horizontal and vertical rigidity (n = 87) Positive for either rigidity (n = 22) Negative for both rigidities (n = 36) P value
Depth of submucosal invasion, n (%) < 1.8 mm 12 (13.8) 12 (54.5) 29 (80.6) 0.0001
≥1.8 mm 75 (86.2)* 10 (45.5)* 7 (19.4)
  1. Positive for horizontal rigidity is defined as horizontal rigidity ≥4.5 mm. Positive for vertical rigidity is defined as vertical rigidity ≥0.7 mm
  2. *P = 0.0006, P = 0.0003