Table 1.

Descriptive statistics of variables used to create constructs at baseline and 6 months (N=612)

Variable	No. of items, Mean	Levels, SD	alpha	No. of items, Percent, Mean	Levels, SD	alpha
	Baseline			6 month
Self-Efficacy: Baseline	12 (4 items)	1–5	0.77			0.84
When I feel nervous	2.43	1.24	0.60	2.81	1.41	0.74
When I feel depressed	2.68	1.32	0.63	2.99	1.42	0.71
When I feel very anxious	2.45	1.35	0.65	2.89	1.42	0.70
When celebrating something	3.22	1.45	0.42	3.62	1.37	0.55
Autonomous Motivation: Baseline	6 (4 items)	1–7	0.85			0.85
I believe it is the best thing for my health	6.53	1.16	0.65	6.59	1.08	0.65
It is very important for many aspects of my life	6.33	1.38	0.70	6.37	1.22	0.73
It is an important choice I want to make	6.32	1.38	0.67	6.37	1.15	0.68
Very important being as healthy as possible	6.26	1.38	0.76	6.32	1.28	0.72
Controlled Motivation: Baseline	6 (4 items)	1–7	0.81		1–7	0.82
Would feel guilty if I smoked	3.47	2.19	0.65	3.70	2.20	0.70
Others would be upset if I smoked	3.72	2.30	0.62	3.72	2.36	0.63
Would feel bad about myself if I smoked	3.90	2.31	0.70	4.04	2.29	0.71
I want others to approve of me	2.86	2.23	0.51	2.74	2.11	0.56