Cloudy with a Chance of Pain: Engagement and Subsequent Attrition of Daily Data Entry in a Smartphone Pilot Study Tracking Weather, Disease Severity, and Physical Activity in Patients With Rheumatoid Arthritis

Samuel Reade   ^{1, 2} , MRes, MBChB ;   Karen Spencer   ² , PhD ;   Jamie C Sergeant   ^{2, 3} , PhD ;   Matthew Sperrin   ⁴ , PhD ;   David M Schultz   ⁵ , PhD ;   John Ainsworth   ³ , PhD ;   Rashmi Lakshminarayana   ⁶ , MPH, MBA, MD, DNB ;   Bruce Hellman   ⁶ , BSc, MBA ;   Ben James   ⁶ , BA (Hons) ;   John McBeth   ² , PhD ;   Caroline Sanders   ⁷ , PhD ;   William G Dixon   ^{2, 4, 8} , MRCP, PhD

¹ Manchester Medical School, University of Manchester, Manchester, United Kingdom

² Manchester Academic Health Science Centre, Arthritis Research UK Centre for Epidemiology, University of Manchester, Manchester, United Kingdom

³ National Institute of Health Research, Manchester Musculoskeletal Biomedical Research Unit, Central Manchester NHS Foundation Trust, Manchester, United Kingdom

⁴ The Farr Institute @ Health eResearch Centre, Manchester Academic Health Science Centre, The University of Manchester, Manchester, United Kingdom

⁵ School of Earth, Atmospheric & Environmental Sciences, The University of Manchester, United Kingdom

⁶ uMotif Limited, London, United Kingdom

⁷ Manchester Academic Health Science Centre, Centre for Primary Care, The University of Manchester, Manchester, United Kingdom

⁸ Salford Royal NHS Foundation Trust, Rheumatology Department, Salford, United Kingdom