Table 2.

Multiple ANCOVA Regression of Cotinine and Cotinine +3′-Hydroxycotinine

	Cotinine (ng/mL)		Cotinine +3′-hydroxycotinine (mol/L)
Measure	Coefficient	p-value	Coefficient	p-value
Mean puff volume (mL)	1.64	<0.01	0.00004	<0.01
Mean puff flow (mL/s)	−1.90	0.03	−0.00005	0.03
Sex	−10.95	0.62	−0.0003	0.54
Height (m)	319.04	<0.01	0.007	0.02
Weight (kg)	−1.30	<0.01	−0.00003	<0.01
Total daily puffs	0.34	<0.01	−0.00001	<0.01
Nicotine metabolite ratio	−112.54	<0.01	0.002	0.01
FTND score	14.94	<0.01	0.0004	<0.01
Time to first cigarette (min)	−0.29	0.03	−0.000007	0.03
Years smoked	4.07	<0.01	0.0001	<0.01
Make your own cigarette smoker	−57.70	<0.01	−0.002	<0.01

FTND, fagerstrom test for nicotine dependence.