Table 3.

Results of model estimating change in % FMD at 3- and 6-month follow-ups of cessation subgroup (upper section) and changes in means (difference over baseline) in %FMD for the cessation subgroup for 3- and 6-month follow-ups (lower section)

Variables	Group/follow-up					B-coeff	Exp (B)		95% CI		p value
									Lower	Upper
%FMD
Group	NRT over EC nicotine-containing					0.46	1.61		− 0.59	1.54	0.38
	EC nicotine-free over EC nicotine-containing					− 0.57	0.57		− 1.74	0.60	0.34
Follow-up	3 m over baseline					2.40	20.04		1.66	3.14	< 0.0001
	6 m over baseline					2.99	11.04		2.22	3.77	< 0.0001
Gender	Male over female					− 1.35	0.26		− 2.27	− 0.43	0.004
Age						− 0.02	0.98		− 0.05	0.01	0.27
Intercept						7.67			5.92	9.42	< 0.0001
%FMD changes over baseline	NRT				EC—nicotine-containing				EC – nicotine-free
	Mean difference	95% CI		p value	Mean difference	95% CI		p value	Mean difference	95% CI		p value
		Lower	Upper			Lower	Upper			Lower	Upper
3 months over baseline
Cessation subgroup	2.61	0.97	4.25	0.003	3.94	1.73	6.15	0.001	4.78	2.27	7.29	0.001
6 months over baseline
Cessation subgroup	4.40	2.18	6.66	0.001	2.96	1.17	4.74	0.002	2.97	0.90	5.04	0.006

%FMD, percentage change in flow-mediated dilation