Patterns of Obstetrical Care in Hospitals

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Abstract
This article examines the determinants of length of stay and ancillary service use for a single diagnostic category: normal delivery. Data for a systematic sample of 945 obstetrical admissions to 48 New England hospitals during 1969-70 are used to estimate a simultaneous equations model. The exogenous variables include socioeconomic and medical characteristics of the mother, medical condition of the newborn, type of labor and delivery, and hospital and physician characteristics. The important findings are threefold: First, evidence is found supportive of a simultaneous relationship between length of stay and ancillary services for normal deliveries. Second, the results show the importance of controlling for the performance of surgery, the presence of complications, the length of labor and the death of the baby in analyzing obstetrical utilization patterns. Third, holding maternal medical and socioeconomic factors constant, hospital size, teaching status, control and location, as well as physician mode of practice and relationship to the hospital, are important determinants of hospital use. It is concluded that the diagnostic-specific approach to utilization analysis is appropriate and useful. Only within such a narrowed focus can researchers disentangle the confounding effects of the attributes of the disease itself from the impact of hospital and physician characteristics on hospital use.

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