Table 2. UW-TTURC Placebo Group: The effect of CHRNA5 rs16969968 on the trajectory of exhaled CO level after quitting is moderated by living with someone who smokes (n=134).

Parameter	β	95% Confidence Interval		P value
		Lower Bound	Upper Bound
Model 1
Age	0.0076	-0.0086	0.024	0.36
Gender	-0.29	-0.69	0.10	0.15
Time	-0.29	-0.34	-0.23	<0.0001
rs16969968	0.36	0.050	0.67	0.023
Partner smoking	0.22	-0.20	0.64	0.31
Model 2
Age	0.0070	-0.0090	0.023	0.39
Gender	-0.29	-0.68	0.11	0.15
Time	-0.28	-0.37	-0.18	<0.0001
rs16969968	0.25	-0.12	0.62	0.18
Partner smoking	0.19	-0.31	0.69	0.45
rs16969968 * Time	-0.021	-0.12	0.081	0.69
Partner smoking * Time	-0.12	-0.28	0.033	0.12
Partner smoking * rs16969968 * Time	0.20	0.049	0.36	0.010