Reliability and validity of Chinese version of the Osteoporosis Knowledge Assessment Tool in the elderly

Objective To test the reliability and validity of the Chinese version of Osteoporosis Knowledge Assessment Tool (OKAT). Methods The English version of OKAT was introduced and the Chinese version was confirmed by translation, revision, retroversion and expert discussion. A sample of 400 community-living aged people were recruited to complete the OKAT (Chinese version). Internal consistency test, split-half reliability, correlation analysis, items analysis, content validity, exploratory factor analysis, confirmatory factor analysis and ROC curve were used for examination. Results The Cronbach's α of the total scale was 0.821. The split half reliability coefficient was 0.934, test-retest reliability was 0.866, inter rater reliability coefficient was 0.786, the correlations between items and total scale ranged from 0.163 to 0.542. A two-factor model containing 20 items was got by exploratory factor analysis, the cumulative contribution rate of the items was 75.528 percent. The confirmatory factor analysis revealed a good model fit. Conclusions The Chinese version of the OKAT in the elderly is proved to be reliable and valid. It can be used to assess osteoporosis for the aged people in China. Key words: Osteoporosis; Aged; Reliability; Validity