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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