Cross-national differences in clinically significant cannabis problems: epidemiologic evidence from 'cannabis-only' smokers in the United States, Mexico, and Colombia

Table 3 Estimated cumulative occurrence of each clinical feature related to abuse among 'cannabis only' users, by country population.

Clinical Features	Colombia		Mexico		Latinos USA (NLAAS)		USA (NCS-R)
	n^¥	% (95%CI)*	n^¥	% (95%CI)*	n^¥	% (95%CI)*	n^¥	% (95%CI)*
Recurrent hazard-laden smoking	9	3 (1, 5)	7	3 (<1, 5)	15	6 (3, 9)	59	3 (2, 4)
Social problems	13	5 (2, 7)	8	3 (<1, 5)	5	2 (<1, 3)	27	1 (1, 2)
Continued smoking despite experiencing these problems^‡	9	4 (1, 6)	6	2 (<1, 4)	4	2 (<1, 3)	22	1 (1, 2)
Work problems	8	2 (<1, 4)	6	2 (<1, 4)	5	1 (<1, 3)	24	1 (<1, 2)
Legal problems	6	2 (<1, 4)	3	1 (<1, 2)	Not available**		5	Not estimated

^¥ These are simple counts of cannabis-only smokers who experienced each clinical feature as listed by row, and by country, before weighting the data. The small counts constrained what can be done in relation to original plans for more complex modeling, and placed limits on statistical power and precision.
* The estimated percents and 95% CI are based on application of the survey weights and estimation as described in the methods section.
** Data on 'Legal problems' are not publicly available for the NLAAS participants (not released to reduce likelihood of a confidentiality violation).
^‡This question was asked only to those who gave a positive answer to the query regarding the experience of social problems.
Data from WMH and CPES Surveys in Colombia, Mexico, and USA, 2002-3.

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