Reliability and validity of the self-efficacy and outcome expectations for osteoporosis medication adherence scales.
PURPOSE: The purpose of this study was to test the reliability and validity of the self-efficacy and outcome expectations for osteoporosis medication adherence measures (SEOMA and OEOMA). DESIGN: This was a descriptive study involving a single face-to-face interview. SAMPLE: The study included 152 older adults with a mean age of 85.7 (+) 5.5 years, the majority of whom were Caucasian (99%), female (74%), and unmarried (75%). METHODS: In addition to the SEOMA and OEOMA measures, demographic information (age, gender, and marital status) and other health behaviors (exercise and osteoporosis medication use) were explored. RESULTS: There was evidence of reliability of the SEOMA and OEOMA based on internal consistency and R values. Evidence of the validity of the SEOMA and OEOMA measures was based on confirmatory factor analysis and hypothesis testing. CONCLUSION: This study is an important first step to developing reliable and valid measures of self-efficacy and outcome expectations for adherence to osteoporosis medications. IMPLICATIONS FOR NURSING PRACTICE: The SEOMA and OEOMA can be used to evaluate self-efficacy and outcome expectancy beliefs related to osteoporosis medication use in older adults and interventions developed to strengthen those beliefs and improve medication adherence.