Background: Self-report questionnaires play an important role as outcome measures in shoulder research. Having an estimate of the measurement error of these ...

The objective of this study was to evaluate the construct validity of two questionnaire-based measures of health-related quality of life (HRQL) in children undergoing cancer chemotherapy: the Health ...

The CVI of the questionnaire itmes ranged from 0.67 to 1.0. Except for one itme, all had CVI values of 0.83 or above (Table 1). However, this item was still retained in the questionnaire based on the ...