The purpose of the study was to validate the selected fall risk assessment scales among hospitalized adult patients from the data of electronic medical records by comparing the sensitivity, specificity, positive predictive value and negative predictive values of Morse Fall Scale(MFS), Bobath Memorial Hospital Fall Risk Assessment Scale(BMFRAS) and Johns Hopkins Hospital Fall Risk Assessment tool(JHFRAT). The 120 patients who experienced fall episodes during their hospitalization as reported at Patient Safety Management System from June 2010 to December 2013 were assigned to the fall-group, while another 120 patients who didn't experience fall episodes with age, sex, clinical departments and wards matched with the fall group were assigned to the control group. Data were collected from January 2014 for two months while maintaining the consistency of data collection. General characteristics and disease-related characteristics of the subjects along with the fall related factors for the fall group were collected from the electronic medical records by using structured data collection forms. Data on fall risk factors were collected by Morse Fall Scale(MFS), Bobath Memorial Hospital Fall Risk Assessment Scale(BMFRAS) and Johns Hopkins Hospital Fall Risk Assessment tool(JHFRAT). Data were entered and analyzed by using SPSSWIN V. 20.0 and Medcalc program was used for comparing the mean difference among AUC of each assessment scale. The results are as follows.1) General characteristics of age, sex, clinical departments and wards were matched between the fall and the no-fall groups, and there was no significant group difference on occupation, education level, and the course of hospitalization. Disease-related characteristics of the circulatory system, nervous system, respiratory system, musculoskeletal system, digestive system, urinary tract disease and eye disease also do not show statistically significant differences between the two groups, confirming homogeneous between the groups.2) The level of physical activity for the fall group was reported as being independent in 43 patients(35.8%), required partial assistance in 42 patients(35.0%), required consistent help in 32 patients(26.7%), and bed-ridden state in 3 patients(2.5%). The symptoms of the fall group include general weakness(49.2%), dizziness(28.3%), sleep disturbances(19.2%) with an average of 2.7 symptoms. The medications taken prior to 24 hours of the falls of the fall group were anti-depressants in 27 patients(22.5%), anti-hypertensives in 49 patients(40.8%), anti-convulsant and pain killers in 33 patients(27.5%), anti-glycemic agents in 26 patients(21.7%) and diuretics in 23 patients(19.2%) with an average of 2.52 medications. The fall accident were frequently occurred in the beds(44.2%) or in their hospital room (59.2%). The patient's condition was the primary reason for fall in 107 cases(89.2%). Physical injury after a fall was occurred in 66 patients (55%), lacerations in 25 patients(20.8%), abrasions in 22 patients(18.3%), or fractures in 14 patients(11.7%).3) The average scores of fall risk assessment scales were 60.8 of the fall group and 41.5 of the no-fall group on Morse Fall Scale(MFS); 10.9 for the fall group and 7.6 for the no-fall group on Bobath Memorial Hospital Fall Risk Assessment Scale(BMFRAS); and 11.8 for the fall group and 9.8 for the no-fall group on Johns Hopkins Hospital Fall Risk Assessment tool(JHFRAT). There was statistically significant differences between the two groups(p