Table 2 Volume of Cannabis-related Tweets, Date Range Studied, Number of Followers, and Frequency of Themes in Tweets from Included Public Health and Governmental Organizations

CPHA

CAMH

HC

CMHA

PHAC

MHCC

CIHR

NIDA

SAMHSA

NIH

APHA

NAMI

CDC

DHHS

Number of followers*

3902

39,802

215,021

21,364

73,964

18,552

41,169

40,374

75,636

811,577

476,891

106,504

863,534

711,590

Date range of included data (mm/yy)

02/15–09/17

07/16–09/17

08/13–09/17

07/12–09/17

11/11–09/17

05/15–09/17

12/15–09/17

04/15–09/17

01/16–09/17

06/15–09/17

08/16–09/17

02/16–09/17

08/16–09/17

05/16–09/17

Number of cannabis-related Tweets (/3200)

108

84

47

5

4

1

5

291

14

3

17

0

0

1

N = 580

  Therapeutic effects

2

20

22

  Smoke (cannabis & tobacco)

3

3

6

  Neurological impacts

10

1

37

1

49

  Substance use disorders

10

10

  Cannabis and mental illness

5

2

9

16

  Expert discussions

6

10

3

3

22

  Governmental announcements

5

8

13

  Issues with legalization

12

1

6

19

  Promoting legalization with regulation

13

3

7

23

  Promoting proposed legislation

4

12

16

  Advertising public consultation

8

1

1

10

  Cannabis and alcohol

2

21

1

24

  Cannabis and opioids

8

1

9

  Sharing research results

3

15

2

1

45

1

67

  Removing barriers to research

1

2

7

10

  Parents

8

8

  Pregnant women

9

9

  Youth and young adults

5

4

3

1

47

6

1

67

  College students

8

8

 T5: Driving and cannabis

3

5

51

  Public perception of cannabis

1

10

2

13

  Cannabis use rates

3

1

1

11

4

1

4

25

 T7: Medical cannabis

18

3

3

11

  Approach to regulation

9

1

1

3

14

  Promoting low-risk guidelines

4

3

1

8

 Totals

88

69

46

7

3

1

326

12

5

5

562