OBJECTIVES: To recommend methodological standards in the prevention and handling of missing data for primary patient-centered outcomes research (PCOR). STUDY DESIGN AND SETTING: We searched National Library of Medicine Bookshelf and Catalog as well as regulatory agencies' and organizations' Web sites in January 2012 for guidance documents that had formal recommendations regarding missing data. We… Continue reading Standards should be applied in the prevention and handling of missing data for patient-centered outcomes research: a systematic review and expert consensus