Table 2.

Mean and standard deviation of TPB constructs for healthy nutrition over three time periods.

Constructs	Group	Time			a p
		Baseline	Two weeks after intervention	12 weeks after intervention	Time	Group	Time × group
Attitude toward healthy nutrition	Control group (n = 45)	27.29 ± 0.63	28.64 ± 0.69	28.19 ± 0.71	<0.001	<0.001	<0.001
	Intervention group (n = 42)	29.07 ± 0.73	70.90 ± 0.50	39.93 ± 0.16
a p		0.069	<0.001	<0.001
Subjective Norme toward healthy nutrition	Control group (n = 45)	30.0 ± 0.96	31.36 ± 0.72	31.33 ± 0.73	<0.001	<0.001	<0.001
	Intervention group (n = 42)	30.45 ± 0.88	40.95 ± 0.61	39.81 ± 0.76
a p		0.686	<0.001	<0.001
Perceived behavioral control (PBC) toward healthy nutrition	Control group (n = 45)	30.78 ± 0.73	31.40 ± 0.63	31.29 ± 0.74	<0.001	<0.001	<0.001
	Intervention group (n = 42)	30.57 ± 0.95	31.04 ± 0.67	37.10 ± 0.80
a p		0.863	<0.001	<0.001
Intention toward healthy nutrition	Control group (n = 45)	31.13 ± 0.72	31.84 ± 0.74	31.78 ± 0.75	<0.001	<0.001	<0.001
	Intervention group (n = 42)	32.79 ± 1.06	40.86 ± 0.72	39.81 ± 0.86
a p		0.198	<0.001	<0.001
Healthy nutrition behavior	Control group (n = 45)	5.02 ± 0.27	5.37 ± 0.25	5.31 ± 0.30	<0.001	<0.001	<0.001
	Intervention group (n = 42)	5.47 ± 0.28	9.47 ± 0.26	8.26 ± 0.32
a p		0.246	<0.001	<0.001

Data are means ± SDs. ^ap values represent the time × group interaction (computed by analysis of repeated measures).