Direct per-person costs attributable to AORC were estimated using a series of four-stage regression analyses (6) that modeled the probability and magnitude of medical care expenditures among adults aged [greater than or equal to] 18 years.
Indirect per-person costs attributable to AORC were derived from a similar four-stage analysis that modeled the probability of employment and the magnitude of lost earnings among persons aged 18-64 years.
In 2003, total direct costs attributable to AORC were $80.
The revised total cost of AORC in the United States was $86.
Editorial Note: This report presents enhanced population-based indirect and total cost estimates of AORC for states and the nation in 1997, based on a revised statistical model.
In this study, inclusion of a categorized, rather than continuous, age variable resulted in a 17% decrease in the national estimate of total AORC costs.
The incremental cost attributable to AORC for each person was calculated as the difference between observed costs and corresponding expected values, which was determined by applying parameter estimates from persons without AORC to estimates from persons with AORC.
The attributable fraction (AF) for direct costs was estimated by dividing the sum of AORC-attributable medical costs for all AORC patients by the sum of medical costs for all persons in the sample for overall total and the four treatment categories.
residents aged [greater than or equal to]18 years had conditions consistent with the AORC case definition.