Author: Petra Klepac; Adam J Kucharski; Andrew JK Conlan; Stephen Kissler; Maria Tang; Hannah Fry; Julia R Gog
Title: Contacts in context: large-scale setting-specific social mixing matrices from the BBC Pandemic project Document date: 2020_2_19
ID: fugb778l_7
Snippet: The data collection process had some limitations. In particular, the initial version of the app had the default age of a contact as 50-years-old. Participants were free to change the value on slider, but if they just clicked through, it would record that contact's age as 50. As a result, the early data had more contacts of this age than was plausible. In our analysis, we therefore remove users with 3 or more contacts of the age exactly 50 (4,007 .....
Document: The data collection process had some limitations. In particular, the initial version of the app had the default age of a contact as 50-years-old. Participants were free to change the value on slider, but if they just clicked through, it would record that contact's age as 50. As a result, the early data had more contacts of this age than was plausible. In our analysis, we therefore remove users with 3 or more contacts of the age exactly 50 (4,007 users dropped). These users together reported 101,880 contacts out of which 24,171 were aged exactly 50-years-old. Second, the initial version did not allow users to record precisely zero contacts: these users may thus be missing from our denominators, we do not expect this effect to be large and for simplicity have not attempted to correct for it here.
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