Estimating breast cancer treatment charges in Connecticut.

Previous studies of estimated costs for cancer treatment have been limited to elderly patients or to specific health maintenance organizations. Data from the statewide population-based Connecticut Tumor Registry on a random sample of 407 breast cancer patients diagnosed in 1991 were linked with a statewide hospital-discharge database, to estimate charges (through September 1993) for inpatient and ambulatory surgery care. For the 377 cases (92.6% of 407) successfully linked, average charges attributed to breast cancer care declined with age, increased with extent of disease (stage at diagnosis), and increased with extent of surgery; these associations persisted in multivariate analyses. Total hospital-related charges for comorbid conditions (during 1991-93) were considerable by age 45 to 64 years. The merged database should be most useful in estimating charges for: cancers treated mainly by surgery (including ambulatory surgery at hospitals); comorbid conditions; and terminal care.