Towards understanding treatment preferences of hospital physicians.

Seventy-two physicians working in a university hospital in The Netherlands were interviewed to clarify their decision-making process when choosing drugs of preference. Each physician was questioned about the treatment choices for either one or two general case descriptions. The physicians considered only a limited set of different treatment options, on an average 1.7-5.0. Further, the physicians expressed their expectancies as regards various treatment alternatives, and the value or weight they attached to the principle aspects of a treatment. An analytical decision model was used as a reference to gain insight into the extent to which the physicians make decisions based on their own subjective expectancies and values. This model assumes that physicians follow a maximizing strategy by choosing the treatment they personally assess as optimal. It was found that a model including only biomedical expectancies and values predicted the preferred treatment correctly in no more than 53% of the cases. Sometimes, biomedical aspects were disregarded that should have been relevant according to the physicians themselves. Adding aspects of the social environment and experiences improved the prediction of the model substantially; 3 out of 4 treatment preferences could be understood by following an analytical maximizing strategy including biomedical aspects and social aspects and experiences. In the remaining cases, the physicians were not able to describe their decision in terms of this maximizing strategy, which points at the use of alternative decision strategies. One alternative decision strategy mentioned by the physicians was a 'follow-the-routine' decision rule.