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Understanding the Predictors of Missing Location Data to Inform Smartphone Study Design: Observational Study

Understanding the Predictors of Missing Location Data to Inform Smartphone Study Design: Observational Study

C: Data completeness around the moment of survey completion (N=24 x 488,400). The red X marks app usage, and 1st is the first full clock hour after data entry. For most participants, the app collected a median of 2 out of a maximum of 24 locations (1760/9665, 18.2% of participants), no location data (1664/9665, 17.2%), or complete location data (1575/9665, 16.3%; Figure 2 A).

Anna L L Beukenhorst, Jamie C Sergeant, David M Schultz, John McBeth, Belay B Yimer, Will G Dixon

JMIR Mhealth Uhealth 2021;9(11):e28857