Table 1.

Drug-related keywords, number of tweets sampled by keywords, relevant tweets, and keyword sensitivity.

Drug-related keywords	Tweets sampled by keyword (n=353), n	Relevant tweets (n=249), n	Keyword sensitivitya, n (%)
#blunt(s)	19	13	13 (68)
Blunt	20	12	12 (60)
#high	20	13	13 (65)
#highlife	20	12	12 (60)
High	20	6	6 (30)
#marijuana	14	7	7 (50)
Marijuana	20	12	12 (60)
#wakenbake	16	9	9 (56)
Ganja	20	17	17 (85)
Pot	20	10	10 (50)
Pothead	20	17	17 (85)
Smoke	20	18	18 (90)
Stoned	20	17	17 (85)
Stoner	20	13	13 (65)
#stoner	12	9	9 (75)
Weed	20	19	19 (95)
Adderall	20	16	16 (80)
Valium	12	11	11 (91)
Xanax	20	18	18 (90)

^aKeyword sensitivity is the percentage of tweets from the total sample that were deemed relevant during manual coding.