Validity and reliability of Resource Utilization Groups (RUG-III) in Finnish long-term care facilities

Resource Utilization Groups, Version III (RUG-III) is a case-mix system dev eloped in the USA for classification of long-term care residents. This pape r examines the validity and reliability of an adapted 22-group version of R UG-III (RUG-III/22) for use in long-term care facilities in Finland. Finnis h cost weights for RUG-III/22 groups are calculated and different methods f or their computation are evaluated. The study sample (1,964 residents) was collected in 1995-96 from ten long-term care facilities in Finland. RUG III /22 alone explained 38.2% of the variance of total patient-specific (nursin g + auxiliary staff) per diem cost. Resource use within RUG groups was rela tively homogeneous. Other predictors of resource use included age, gender a nd length of stay. RUG-III/22 also met the standard for good reliability (i .e, a kappa value of 0.6 or higher) for crucial classification items, such as activities of daily living and high correlation between assessments base d on relative cost.