Table 1 Baseline descriptive characteristics of the study population.

Age, years

49 (36–64)

49 (36–64)

49 (36–64)

Age group

 > 0.99

Twenties

11,880 (12.3)

2376 (12.3)

9504 (12.3)

Thirties

19,255 (19.9)

3851 (19.9)

15,404 (19.9)

Forties

18,370 (19.0)

3674 (19.0)

14,696 (19.0)

Fifties

15,750 (16.3)

3150 (16.3)

12,600 (16.3)

Sixties

16,610 (17.2)

3322 (17.2)

13,288 (17.2)

Seventies

14,730 (15.3)

2946 (15.3)

11,784 (15.3)

Sex

 > 0.99

Male

34,720 (35.9)

6944 (35.9)

27,776 (35.9)

Female

61,875 (64.1)

12,375 (64.1)

49,500 (64.1)

Type of insurance

 < 0.01

Self-employed health insurance

39,519 (40.9)

7369 (38.1)

32,150 (41.6)

Employee health insurance

52,047 (53.9)

10,198 (52.8)

41,849 (54.2)

Medical aid

5029 (5.2)

1752 (9.1)

3277 (4.2)