Table 2.

Adjusted association between age at onset of psychosis, age at onset of cannabis and other potential predictors among cannabis using subjects.

	β	95% confidence interval	p-value
Age at cannabis onset	0.4	0.1-0.7	0.004
Alcohol abuse/dependence	−0.1	−2.0-2.0	0.987
Age	0.6	0.4-0.7	<0.001
Sex	−0.8	−3.0-1.4	0.462
First degree relative with schizophrenia	−1.5	−4.2-1.2	0.268
Constant	2.6	−3.9-9.1	0.420

Age at cannabis onset: continuous variable

Age: continuous variable

Sex: 0-female, 1-male

First degree relative with schizophrenia: 0-no, 1-yes

Constant: regression model constant variable