Identifying Factors Associated With Dropout During Prerandomization Run-in Period From an mHealth Physical Activity Education Study: The mPED Trial

Yoshimi Fukuoka   ¹ , RN, PhD ;   Caryl Gay   ² , PhD ;   William Haskell   ³ , PhD ;   Shoshana Arai   ⁴ , RN,PhD ;   Eric Vittinghoff   ⁵ , PhD

¹ Institute for Health & Aging, Department of Social and Behavioral Sciences, University of California, San Francisco, San Francisco, CA, United States

² Institute for Health & Aging, Department of Family Health Care Nursing, University of California, San Francisco, San Francisco, CA, United States

³ Stanford Prevention Research Center, Stanford University, Palo Alto, CA, United States

⁴ Institute for Health & Aging, University of California, San Francisco, San Francisco, CA, United States

⁵ Department of Epidemiology & Biostatistics, University of California, San Francisco, San Francisco, CA, United States