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. Author manuscript; available in PMC: 2021 Apr 2.
Published in final edited form as: Semin Arthritis Rheum. 2020 Jul 23;50(5):988–995. doi: 10.1016/j.semarthrit.2020.07.008

Table 1:

Characteristics of Patients with Rheumatoid Arthritis Disabled, Younger than 65 Years of Age, and Dually Eligible for Medicare and Medicaid

Characteristic 2007
N = 12,931
2011
N = 15,033
2014
N= 15,599
White Black Hispanic Other White Black Hispanic Other White Black Hispanic Other
Number 7,631 2,721 2,101 478 8,830 3,400 2,150 653 9,152 3,309 2,504 634
Female, % 80.5 88.6 83.9 81.4 80.2 88.1 83.4 79.6 80.0 88.2 83.6 82.0
Age Category, %
under 30 years (y) 2.9 2.1 2.8 3.1 2.6 2.3 2.7 3.2 2.3 2.1 2.6 3.5
31 - 40 8.2 7.5 8.2 11.3 8.2 6.7 8.0 9.5 7.4 7.1 8.5 7.4
41 - 50 26.0 26.1 22.6 23.6 24.0 22.8 21.2 19.8 21.7 20.2 19.3 18.6
51 - 60 43.1 45.0 46.3 44.8 45.2 47.8 45.4 43.6 49.3 49.2 48.2 48.7
61 - 64 19.8 19.2 20.2 17.2 19.9 20.4 22.7 23.9 19.2 21.5 21.4 21.8
United States Region, %
Northeast 29.6 35.8 6.8 19.9 27.6 35.6 10.6 19.5 27.8 36.4 10.3 21.0
Midwest 16.5 11.2 7.0 11.7 19.0 14.9 9.5 14.1 18.6 15.7 8.5 12.9
South 32.8 35.8 71.2 46.2 30.4 33.2 61.6 45.6 31.6 32.0 64.3 43.4
West 12.1 8.8 6.5 9.2 12.5 8.0 8.7 8.6 13.0 9.1 8.1 9.8
Outlying areas 9.2 8.6 8.5 12.3 10.5 8.4 9.6 12.3 9.1 6.7 8.8 12.9
Area Depravation Index
Mean, (SD) 61.7 (24.2) 70.9 (24.7) 59.5 (27.9) 51.3 (28.3) 61.6 (24.1) 70.7 (24.6) 56.1 (27.8) 51.3 (28.9) 60.7 (24.0) 70.7 (24.3) 61.1 (27.2) 51.8 (29.0)
Chronic Conditions, %
Myocardial infarction, or Stroke or Transient Ischemic Attack 3.7 3.2 3.2 1.9 3.4 4.6 2.8 2.6 3.1 4.1 2.6 2.4
Heart Failure 6.1 8.9 5.6 3.6 5.7 9.5 4.4 4.0 5.2 8.4 4.5 2.8
Diabetes mellitus 22.9 30.1 33.9 24.5 23.7 32.6 32.4 29.7 23.7 31.6 31.9 28.4
Diabetes Complications 2.0 2.5 3.2 3.4 1.9 3.2 4.1 4.6 2.4 3.5 3.6 2.7
PVD 4.7 4.8 5.0 4.0 5.5 6.9 4.6 4.3 5.3 6.4 4.9 4.3
Hemiplegia or paraplegia or SCI 0.3 0.4 0.4 0.8 0.4 0.4 0.3 0.0 0.4 0.4 0.4 0.6
Multiple Sclerosis 0.9 0.7 0.6 0.0 0.9 1.1 0.4 0.6 0.9 0.8 0.4 0.5
Dementias 0.6 0.5 0.6 0.4 1.0 0.6 0.6 0.0 1.1 0.7 0.9 1.0
COPD 20.8 11.5 10.3 8.4 22.6 15.0 10.4 10.7 22.3 14.5 9.3 10.6
Fibromyalgia 25.9 20.8 29.3 19.3 37.4 32.8 31.8 28.6 44.2 38.3 39.9 33.6
Mental Illness 31.9 18.6 24.8 22.0 39.5 27.3 29.8 24.4 48.9 32.4 37.8 33.3
  Depression or Anxiety 29.4 17.4 23.8 20.5 36.6 25.3 28.4 22.2 45.7 29.8 36.7 31.7
Charlson-Deyo Comorbidity Index Score,%
1 50.8 49.9 50.0 55.6 48.4 44.7 47.4 49.5 48.1 44.1 49.3 52.2
2 29.6 28.0 29.9 28.2 29.6 28.5 32.2 30.0 30.0 29.0 30.3 29.3
≥3 19.6 22.1 20.1 16.1 22.0 26.8 20.4 20.5 21.9 26.8 20.4 18.5
Any csDMARD, % 66.0 66.7 69.4 67.6 65.8 67.7 67.9 66.6 63.5 66.4 65.6 64.7
csDMARD no bDMARD,% 31.4 34.5 26.6 27.8 30.0 35.3 25.1 26.8 29.2 32.7 24.8 27.4
Any bDMARD,% 49.7 45.4 56.7 56.1 51.7 46.1 59.0 57.3 53.3 49.3 60.9 57.9
Any SQ bDMARD,% 33.5 29.2 35.4 36.4 33.7 28.3 35.2 35.4 35.3 30.8 35.7 37.5
Any IV bDMARD,%  18.7 18.3 24.9 23.0 20.6 19.6 27.1 25.0 17.9 18.3 26.6 20.8
Neither csDMARD or bDMARD, % 18.9 20.1 16.7 16.1 18.3 18.7 12.7 15.9 17.5 18.0 14.3 14.7
Glucocorticoids*, % 37.8 38.3 35.8 37.9 36.1 36.6 34.5 38.0 34.7 36.3 30.2 36.3
Opioids**,% 66.0 58.9 48.8 48.5 67.8 64.0 49.5 55.0 66.7 64.6 54.8 50.2

csDMARD, conventional synthetic disease-modifying anti-rheumatic drug; bDMARD, biologic disease-modifying anti-rheumatic drug; SQ, subcutaneous; IV, intravenous. SCI = spinal cord injury; PVD = peripheral vascular disease; COPD = chronic obstructive pulmonary disease

csDMARDs included methotrexate, leflunomide, hydroxychloroquine, sulfasalazine, and azathioprine.

SQ bDMARDs included adalimumab, etanercept, certolizumab, golimumab, abatacept, and tocilizumab.

IV bDMARDs included infliximab, rituximab, tocilizumab, abatacept, and golimumab.

*

Long-term glucocorticoid treatment was defined as an annual cumulative prednisone-equivalent dose of 900 mg or more.

**

Long-term opioid use was defined as a 30-day prescription refilled for ≥ 2 additional months or a 90-day supply in a single prescription.

Mental illness was defined as any of the following conditions: anxiety, depression, bipolar disorder, multiple personality disorder or schizophrenia.

Notes: The higher the mean score of the ADI the highest the deprivation and the worse the socioeconomic status; Outlying areas include Alaska, Hawaii and U.S. territories.