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Am J Manag Care. 1998 Aug;4(8):1127-34.

The cost of inpatient endometriosis treatment: an analysis based on the Healthcare Cost and Utilization Project Nationwide Inpatient Sample.

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  • 1G.D. Searle & Co., Skokie, IL 60077, USA.



To determine the prevalence and cost of endometriosis-related hospitalizations based on the Nationwide Inpatient Sample (NIS) from the Healthcare Cost and Utilization Project (HCUP-3).


Retrospective analysis based on nationwide clinical practice data.


Data were obtained for 1991 and 1992 from the HCUP-NIS database, which was a 20% sample of all US hospital discharges. ICD-9 codes (236.0, 617.0 to 617.9) were used to identify females, aged 15 to 54, with endometriosis as a diagnosis. The distribution of endometriosis admissions by admission type, length of stay (LOS), mean total charge, specific types of endometriosis, principal procedures, and other diagnosed diseases was described.


In 1991 and 1992, 37,273 (22.6/1000) and 38,834 (23.7/1000) hospital admissions, respectively, were for endometriosis (as any diagnosis). The average LOS and total hospital charges for endometriosis as the primary diagnosis were 3.8 days and $6,597 for 1991, and 3.5 days and $7,450 for 1992. Most endometriosis admissions occurred in females aged 35 to 49. About 87% of the endometriosis hospitalizations were routine admissions. The most common diagnosis was endometriosis of the uterus (51%); the most common procedure was a total abdominal hysterectomy (55%-60%). Older and African-American patients had the longest LOS and the highest total charges. The estimated total hospitalization costs, as represented by hospital charges, for women with endometriosis as the primary diagnosis in the United States were $504 million for 1991 and $579 million for 1992.


Endometriosis-related hospitalization is a major burden on healthcare systems.

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