VARIATION IN DURATION OF HOSPITAL STAY BETWEEN HOSPITALS AND BETWEEN DOCTORS WITHIN HOSPITALS

Whether one examines the average length of hospital stay at the level of geographic areas, at the level of hospitals, or at the level of doc tors, length-of-stay figures are known to vary widely. Even for hospit al admissions for comparable surgical procedures among comparable grou ps of patients, significant length-of-stay variations have been report ed. As is the case for variations in the occurrence of common surgical procedures, the overall conclusion is that large variations in durati on of hospital stay associated with these common surgical procedures a re the rule rather than the exception. The objective of the study is t o examine whether variations in hospital medical practice, indicated b y the duration of hospital stay in this study, can be reduced to diffe rences in practice style between individual doctors within the same in stitutional setting or to differences in practice style between groups of doctors within the same institutional setting. The latter is assum ed to be the combined effect of restrictions on the (hospital) supply side and the predilection of doctors to conform to the practice of imm ediate colleagues. It was found out that the variation in length of ho spital stay, adjusted for patient case-mix, within hospitals is much s maller than the length-of-stay variation between different hospitals. The within hospital variation between (partnership of) doctors is in m ost of the cases statistically insignificant. Doctors working in more than one hospital on average choose a length of stay close to the aver age length of stay prevailing in the different hospitals.