Incidence of self-reported brain injury and the relationship with substance abuse: findings from a longitudinal community survey

Table 5 Risk factors for the development of new marijuana problems at wave two

			New (Wave two) Marijuana Problems
		df	Wald	sig	Risk	95% CI
Age groups	(20-24)
	40-44	1	4.685	.030	0.449	.218 - .927
	60-64	1	10.475	.001	0.033	.004 - .261
Gender	(female)	1	12.967	<.001	2.507	1.520 - 4.136
Marital status W1	(married/de facto)
	Separated/divorced/widowed	1	<.001	.996	1.003	.284 - 3.542
	Never married	1	7.387	.007	2.543	1.297 - 4.986
Depression medication W1	(no)	1	.345	.557	1.413	.446 - 4.475
Anxiety medication W1	(no)	1	.749	.387	1.573	.564 - 4.386
Pain medication W1	(no)	1	2.106	.147	.698	.430 - 1.134
Memory medication W1	(no)	1	<.001	.995	.000	.000 -^a
Sleep medication W1	(no)	1	.081	.776	1.121	.510 - 2.467
Smoker W1	(no)	1	52.322	<.001	5.603	3.513 - 8.938
BI (W1-W2)	(no)	1	1.996	.158	2.046	.758 - 5.521
Marijuana problems W1	(no)	1	NiM	NiM	NiM	NiM
Alcohol problems W1	(no)	1	.116	.734	.859	.356 - 2.069

Items in parenthesis show the reference category: ^a No cases used memory medication and developed marijuana problems
W1 = wave one: BI (W1-W2) = brain injury (incident case e.g. first occurrence) between Wave one and wave two: NiM = not in model

ISSN: 1471-2458