Table 2.

Logistic regression of having ADHD symptoms. Nested models.

Variables	Frequency	Model 1		Model 2
		Odds	p-value	Odds	p-value
Sex (ref. M)	75.4
F	24.6	1.117	0.564	1.102	0.611
Age (ref. < 35 yrs)	39.0
35–49 yrs	45.4	1.036	0.851	1.046	0.813
50+ yrs	15.6	0.727	0.237	0.735	0.271
Marital status (ref. Ever-married)	33.4
Unmarried	66.6	1.162	0.427	1.135	0.520
Educ. Attainment (ref. Primary)	58.4
Lower Secondary	21.9	1.246	0.284	1.271	0.242
Secondary / University	19.6	0.995	0.982	1.032	0.888
Employment (ref. Unemployed)	46.9
Employed	53.1	0.513	< 0.001	0.528	< 0.001
Smoking Habit (ref. Not smoking)	9.8
Smoking < =18 cigarettes	50.2	1.138	0.678	1.075	0.816
Smoking 19–20 cigarettes	28.1	1.074	0.830	0.984	0.960
Smoking 21+ cigarettes	11.9	2.039	0.046	1.906	0.070
Treatment (ref. Buprenorphine)	23.2
Methadone	76.8			1.808	< 0.001
N		1003			1003
N (ADHD rate)		191			191
Log-likelihood		−471.3			−467.4
Wald (χ2)		25.6			35.9
p-value		0.004			< 0.001