Real-time tracking of self-reported symptoms to predict potential COVID-19

  title={Real-time tracking of self-reported symptoms to predict potential COVID-19},
  author={Cristina Menni and Ana M. Valdes and Maxim B. Freidin and Carole H. Sudre and Long H. Nguyen and David A. Drew and Sajaysurya Ganesh and Thomas Varsavsky and Manuel Jorge Cardoso and Julia Sarah El-sayed Moustafa and Alessia Visconti and Pirro G. Hysi and Ruth C. E. Bowyer and Massimo Mangino and Mario Falchi and Jonathan Wolf and S{\'e}bastien Ourselin and Andrew T. Chan and Claire J. Steves and Tim D. Spector},
  journal={Nature Medicine},
A total of 2,618,862 participants reported their potential symptoms of COVID-19 on a smartphone-based app. Among the 18,401 who had undergone a SARS-CoV-2 test, the proportion of participants who reported loss of smell and taste was higher in those with a positive test result (4,668 of 7,178 individuals; 65.03%) than in those with a negative test result (2,436 of 11,223 participants; 21.71%) (odds ratio = 6.74; 95% confidence interval = 6.31–7.21). A model combining symptoms to predict probable… 

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