Table 1.

Dataset statistics. BMI refers to body mass index.

Observation period	Jan. 2011 – Jan. 2016
Introduction of the social network	November 2013
# total users	6.0 million
# total online and offline activities	791 million
# activity posts (online engagement)	631 million
# users tracking steps	2.0 million
# days of steps tracking (offline activity)	160 million
# total steps tracked	824 billion
# users in the social network	211,383
# edges in the social network	563,007
Median age	33 years
% users female	46.1%
% underweight (BMI < 18.5)	4.7%
% normal weight (18.5 ≤ BMI < 25)	44.2%
% overweight (25 ≤ BMI < 30)	30.2%
% obese (30 ≤ BMI)	20.9%