In recent years, much of the care traditionally rendered in hospitals
has been shifted to ambulatory settings. This change has been fueled a
s much by changing patterns of reimbursement as by rapid developments
in medicine and technology. The current climate of health-care reform
suggests that this trend will continue for the near future. Unfortunat
ely, there are few studies that systematically evaluate the cost effec
tiveness or benefits of ambulatory care. Among the few such studies pu
blished to date, the results are not overwhelmingly positive. While th
e monetary costs of ambulatory care are generally far lower than inpat
ient management, several studies suggest that family and household dis
ruption are prominent features of outpatient strategies. Thus, the mea
surement of the direct and indirect costs and benefits of ambulatory t
reatment presents a significant challenge to researchers. Development
of methodologies to support such studies must be among our highest pri
orities.