Table 1. Demographic Characteristics and Online Activity Patterns for Case and Control Populations, 2019-2020a.
| Group | No. | Age, mean (SD) [range], yb | Sex, No. (%)c | Activities, mean (SD)d | |||
|---|---|---|---|---|---|---|---|
| Female | Male | Gmail | Google Drive | Google Chrome | |||
| Cases | 227 | 13.1 (2.18) [7-18] | 118 (52) | 109 (48) | 1270.98 (3559.77) | 133.43 (165.10) | 1448.10 (2899.59) |
| Controls | 1135 | 13.3 (2.46) [6-18] | 545 (48) | 590 (52) | 1027.72 (3220.83) | 146.90 (383.04) | 1125.72 (2723.44) |
a
Data from implementation of Bark’s programs and services.
b
Age imputed from grade.
c
Sex imputed from name through analysis of names in US Census data.30
d
Activities refer to the number of discrete online actions, such as sending an email (through Gmail), sharing a message in Google Docs (in the case of Google Drive), or conducting a web search (in the case of Google Chrome).