Objectively Measured Life Space Using Participants’ Mobile Phones: Cross-Sectional Study

Michelle C Odden   ¹ , PhD ;   Annabel X Tan   ¹ , PhD, MPH ;   Sylvie Dobrota Lai   ¹ , MS ;   J David Rhodes   ² , MPH ;   Suzanne Judd   ² , PhD ;   Kyle Sargent   ³ , AB ;   Sheila Mwanda   ¹ , BS ;   Sage Rowe   ¹ , BA ;   Jiajun Wu   ³ , PhD ;   Abby C King   ^{1, 4} , PhD ;   Vishnu Ravi   ⁵ , MD

¹ Department of Epidemiology and Population Health, Stanford University, Stanford, CA, United States

² Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States

³ Department of Computer Science, Stanford University, Stanford, CA, United States

⁴ Stanford Prevention Research Center, Department of Medicine, Stanford University, Stanford, CA, United States

⁵ Byers Center for Biodesign, Stanford University, Stanford, CA, United States