EFFECT OF ONLINE LITERATURE SEARCHING ON LENGTH OF STAY AND PATIENT-CARE COSTS

Purpose. To examine the associations between (1) the economic indicato rs of hospital costs, charges, and length of stay (LOS) for inpatient cases and (2) the use of MEDLINE searches for such cases. Method. An o utcome-based, objective, prospective study with an economic evaluation was conducted from September 1989 to September 1990 at three metropol itan Detroit teaching hospitals representing both allopathic and osteo pathic care. The study consisted of (1) 192 test cases, derived from a consecutive sample of inpatients of all ages for whom MEDLINE searche s were requested at the participating medical libraries, and (2) 10,40 9 control cases, which were of the same diagnosis-related groups (DRGs ) as the test cases but did not involve identified MEDLINE searches. S tatistical analysis included the use of multivariate analyses of varia nce and correlation coefficients. Comparisons of cases were made on ca se-by-case and DRG bases regarding total patient costs, charges, and l engths of stay for cases with or without MEDLINE searches. Results. Th e test cases were found to have a higher severity of illness. Among te st cases, statistically significant relationships existed between (1) hospital expenses and LOS and (2) hospital expenses and the timing of the search during hospitalization when controlling for LOS. When cases were matched for DRG and LOS, the cases with early searches (i.e., co nducted during the first half of hospitalization) had significantly lo wer expenses. Conclusion. Of the test-case patients (for whom MEDLINE searches were conducted during hospitalization), those whose searches were conducted earlier had statistically significantly lower costs, ch arges, and lengths of stay than those whose searches were conducted la ter.