. Author manuscript; available in PMC: 2009 Jul 1.

Published in final edited form as: Arthritis Rheum. 2008 Aug;58(8):2236–2240. doi: 10.1002/art.23731

Table 2. Adjusted Total Out-of-Pocket and Out-of-Pocket Expenditures for Prescription Drugs 1998 Vs. 2004 for Adults with Arthritis Age 65 or Older.

(Expenditures in 2004 Dollars adjusted for age, gender, marital status education, income)

	1998	2004	Difference [95% CI]
Panel A: Out-of-Pocket Expenditures for Prescription Drugs
Median	415	714	299 [200,435]
75^th Percentile	906	1,482	576 [347,791]
90^th Percentile	1,602	2,830	1,227 [523,1638]

Panel B: Total Out-of-Pocket Expenditures
Median	757	1,154	397 [256,581]
75^th Percentile	1,334	2,014	681 [419,1,080]
90^th Percentile	2,452	4,196	1,743 [855,2,396]

Note: Bootstrapped Confidence Interval in squared brackets. Reference group: white, female, age 75, not married, in good health, 12 years education, mean income ($23,585 in 2004 dollars) with one other chronic condition.