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Table 1 Demographic characteristics of the rheumatic disease patients a

From: Comparison of cancer incidence among patients with rheumatic disease: a retrospective cohort study

 

RA (n = 2,104)

SLE (n = 1,052)

SSc (n = 274)

DM (n = 107)

PM (n = 49)

Age at RD diagnosis, yr, mean (SD)

51.0 (13.3)

35.0 (13.4)

48.5 (14.0)

45.5 (13.4)

47.9 (13.7)

Sex, female (%)

1,716 (81.6)

935 (88.9)

240 (87.6)

81 (75.7)

40 (81.6)

Mean follow-up duration, yr (SD)

7.4 (4.2)

8.9 (4.8)

6.6 (4.5)

6.1 (4.8)

6.7 (4.8)

Total follow-up duration in person-years

17,436

10,410

2,088

758

372

Cancer, n (%)

106 (5.0)

53 (5.0)

16 (5.8)

10 (9.3)

2 (4.1)

Age at cancer diagnosis, yr, mean (SD)

62.8 (11.7)

47.3 (14.7)

55.5 (11.9)

58.1 (14.6)

65.8 (0.3)

Time between RD and cancer, yr, mean (SD)

5.0 (3.5)

7.4 (4.0)

5.8 (3.5)

2.0 (2.1)

5.0 (6.1)

  1. aDM, Dermatomyositis; PM, Polymyositis; RA, Rheumatoid arthritis; RD, Rheumatic disease; SD, Standard deviation; SLE, Systemic lupus erythematosus; SSc, Systemic sclerosis.