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. Author manuscript; available in PMC: 2017 Jan 13.
Published in final edited form as: Proc ACM Int Conf Ubiquitous Comput. 2016 Sep;2016:875–885. doi: 10.1145/2971648.2971666

Table 2.

Characterizing the field dataset (37 days) by utox outcomes and subjects’ self-reporting

Self-
report		 utox
<5000 ng/mL		 utox
≥5000 ng/mL
Cocaine use 2 24
No cocaine use 7 4