Trend and predictors of unplanned hospitalization of older patients during the first year after admission into a home medical service.

The primary aim was to determine the trend and predictors of unplanned hospitalization of home medical patients. Records of 1,069 patients were obtained from the medical records. Out of 1,069, we analyzed 512 patients who had utilized services across all four quarters in the first year of admission. There was a significant decline in unplanned hospitalization between the first two quarters. The potential risk factors were the male gender, IRR (95% CI), 1.29 (0.99-1.67); chronic pulmonary disease, 1.53 (1.08-2.16); dementia, 1.29 (1.00-1.66); ischemic heart disease, 1.33 (1.02-1.74); and history of fractures, 1.49 (1.13-1.96).