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Table 3 Sampled patients with side identified by ICD code or by abstraction

From: Validation of diagnosis codes to identify side of colon in an electronic health record registry

Tumor location, n (%) Side identified by ICD code Side identified by abstraction (n = 200)
Including unspecified ICD codes (n = 200) Excluding unspecified ICD codes (n = 124)
Left colon only 70 (35) 70 (56) 99 (49.5)
Right colon only 35 (17.5) 35 (28) 67 (33.5)
Transverse colon only 10 (5) 10 (8) 12 (6)
Unspecified colon site only 76 (38) 22 (11)
Rectum 8 (4) 8 (6) 0
Right colon and transverse colon 1 (0.5) 1 (0.8) 0
  1. ICD International Classification of Diseases