INTRODUCTION: This study investigated the effects of imputing missing data in the WHO Quality of Life Abbreviated Questionnaire (WHOQOL-BREF). The imputation results from both the item and domain leve...
Statistical analysis in epidemiologic studies is often hindered by missing data, and multiple imputation is increasingly being used to handle this problem. In a simulation study, the authors compared ...
Missing data is a common problem in psychological research. Missing data can occur due to attrition in a longitudinal study or non-response to questionnaire items in a laboratory or field setting. Imp...
Genotype imputation is now an essential tool in the analysis of genome-wide association scans. This technique allows geneticists to accurately evaluate the evidence for association at genetic markers ...