Table 3.

Blinder-Oaxaca Decomposition of Sex Differences in Cotinine and Cotinine +3′-Hydroxycotinine

	Cotinine (ng/mL)		95% confidence interval		Cotinine +3′-hydroxycotinine (mol/L)		95% confidence interval
Measure	Coefficient	p-value	Lower	Upper	Coefficient	p-value	Lower	Upper
Difference	65.91	<0.01	31.53	100.29	0.001185	0.01	0.003	0.021
Explained	54.97	<0.01	16.31	93.62	0.00075	0.04	−0.003	0.02
Unexplained	10.94	0.608	−30.84	52.74	0.000435	0.44	−0.007	0.02
Mean puff volume (mL)	14.45	<0.01	3.00	25.90	0.004	0.01	0.0008	0.007
Mean puff flow (mL/s)	−6.69	0.06	−13.36	0.52	−0.0016	0.07	−0.003	0.0001
Height (m)	47.34	<0.01	12.72	81.96	0.01	0.02	0.002	0.02
Weight (kg)	−13.29	<0.01	−22.96	−3.62	−0.004	<0.01	−0.006	−0.001
Total daily puffs	3.57	0.31	−3.26	10.40	0.001	0.34	−0.001	0.003
Nicotine metabolite ratio	9.79	0.02	1.65	17.93	0.001	0.04	0.0001	0.003
FTND score	6.72	0.13	−1.88	15.32	0.002	0.12	−0.0005	0.005
Time to first cigarette (min)	4.08	0.13	−1.26	9.42	0.00006	0.73	−0.0003	0.0004
Years smoked	−7.38	0.21	−18.86	4.11	−0.002	0.19	−0.005	0.001
Make your own cigarette smoker	−3.64	0.22	−9.50	2.22	−0.001	0.21	−0.003	0.0006