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Table 1 Patient characteristics of full EDM registry patients and 200 randomly selected study patients

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

Baseline characteristics, n (%) Sampled patients N = 200 Parent cohort N = 9403
Age at metastatic diagnosis (years), median (IQR) 67.0 (57.0–76.0) 66.0 (56.0–75.0)
Age at metastatic diagnosis category, years
 18–34 2 (1.0) 118 (1.3)
 35–49 25 (12.5) 1003 (10.7)
 50–64 55 (27.5) 3162 (33.6)
 ≥ 65 118 (59.0) 5120 (54.5)
Sex
 Female 100 (50.0) 4385 (46.6)
 Male 100 (50.0) 5017 (53.4)
 Other/Unknown 0 1 (0.01)
Region
 Northeast 53 (26.5) 2630 (28.0)
 Midwest 40 (20.0) 1627 (17.3)
 South 71 (35.5) 3340 (35.5)
 West 30 (15.0) 1470 (15.6)
 Other/unknown 6 (3.0) 336 (3.6)
Practice type
 Community 188 (94.0) 8923 (94.9)
 Academic 12 (6.0) 480 (5.1)
Stage at diagnosis
 0–I 5 (2.5) 199 (2.1)
 II 18 (9.0) 993 (10.6)
 III 55 (27.5) 2247 (23.9)
 IV 107 (53.5) 5627 (59.8)
 Not documented 15 (7.5) 337 (3.6)
Tumor site: Colon 200 (100.0) 9403 (100.0)
Side of colon (from abstracted data)
 Left side 99 (49.5) NA
 Right side 67 (33.5) NA
 Transverse colon 12 (6.0) NA
 Unspecified 22 (11.0) NA
  1. EDM Electronic data mart, NA not applicable