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Table 2 Demographic characteristics of the breast cancer and non-cancer patient cohorts

From: Misclassification of incident conditions using claims data: impact of varying the period used to exclude pre-existing disease

  

Breast cancer

Non-cancer

Characteristic

 

patients

patients

 

N = 33,731 (%)

N = 101,649 (%)

Age (years) a

≤ 70

5,498 (16.3)

27,783 (27.3)

 

71-75

9,618 (28.5)

29,883 (29.4)

 

76-80

8,903 (26.4)

24,098 (23.7)

 

> 80

9,712 (28.8)

19,885 (19.6)

Race/ethnicity

White

29,487 (87.4)

85,329 (83.9)

 

Black

2,173 (6.4)

7,483 (7.4)

 

Asian/Other

1,016 (3.0)

6,317 (6.2)

 

Hispanic

1,055 (3.1)

2,520 (2.5)

SEER Region c

Georgia (Atlanta/Rural Georgia)

1,009 (3.0)

3,575 (3.5)

 

California b

10,533 (31.2)

30,910 (30.4)

 

Connecticut

2,121 (6.3)

6,380 (6.3)

 

Hawaii

442 (1.3)

1,712 (1.7)

 

Iowa

2,397 (7.1)

7,172 (7.1)

 

Kentucky

2,889 (8.6)

8,680 (8.5)

 

Louisiana

2,355 (7.0)

6,920 (6.8)

 

Michigan (Detroit)

2,638 (7.8)

8,029 (7.9)

 

New Jersey

5,950 (17.6)

15,961 (15.7)

 

New Mexico

717 (2.1)

2,751 (2.7)

 

Utah

851 (2.5)

3,006 (3.0)

 

Washington (Seattle/Puget Sound)

1,829 (5.4)

4,665 (4.6)

NCI Comorbidity score d

0

27,193 (80.6)

76,804 (75.6)

 

1

3,965 (11.8)

18,087 (17.8)

 

≥2

2,573 (7.6)

6,758 (6.6)

Year of diagnosis

2000

11,433 (33.9)

N/A

 

2001

11,432 (33.9)

 
 

2002

10,866 (32.2)

 
  1. aAge at diagnosis index date.
  2. bCalifornia includes Los Angeles, San Francisco/Oakland, San Jose/Monterey, and Greater California.
  3. c1,888 non-cancer patients had no region reported.
  4. dComorbidity index based on conditions identified in the 12 months prior to the diagnosis index date.