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Table 1 Patient characteristics pre-matching

From: The prevalence and burden of systemic lupus erythematosus in a medicare population: retrospective analysis of medicare claims

  Medicare disabled age <65 years Medicare age ≥65 years
Characteristics SLE cohort Non-SLE cohort SLE cohort Non-SLE cohort
N = 5,555 N = 455,950 N = 7,793 N = 2,250,012
Mean age, years 49 50 74 74
Female, % 87* 46* 83** 57**
Race, %     
White 62.6* 73.3* 84.3 85.5
Black 28.3* 18.4* 10.1 8.2
Other 9.2 8.3 4.4 6.3
Region, %     
Northeast 15.9* 18.4* 19.2 19.9
Midwest 18.9* 21.4* 19.7** 23.0**
South 46.3* 39.9* 42.3** 35.0**
West 16.8* 17.6* 17.7** 20.1**
Other 2.1 2.8 1.2 2.1
  1. *P < 0.05 between Medicare Disabled age <65 cohorts.
  2. **P < 0.05 between Medicare age ≥65 cohorts.