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. 2009 Jan;11(1):64–76. doi: 10.1093/ntr/ntn012

Table 2.

Smoking status and smoking rate by DRD2 Taq1A genotype

	DRD2 Taq1A genotype
	A1A1	A1A2	A2A2		OR/β	95% CI	p value
Ever smoked (n = 2,409)	43/101	307/723	679/1,585	Unadjusted	1.01	0.88–1.17	0.88
Ever smoked (n = 2,409)	43%	43%	43%	Adjusted	1.01	0.88–1.17	0.85
Smoke at present (n = 1,376)	11/52	69/404	172/920	Unadjusted	0.97	0.76–1.24	0.80
Smoke at present (n = 1,376)	21%	17%	19%	Adjusted	0.97	0.75–1.25	0.83
Cigarettes per day, n = 256	M = 8 (SD = 7), n = 12	M = 12 (SD = 7), n = 69	M = 12 (SD = 7), n = 175	Unadjusted	−1.19	−2.71–0.34	0.13
Cigarettes per day, n = 256	M = 8 (SD = 7), n = 12	M = 12 (SD = 7), n = 69	M = 12 (SD = 7), n = 175	Adjusted	−0.81	−0.79–0.22	0.28