The effect of educational intervention based on theory of planned behavior on behavioral responses of premenopausal women in prevention of osteoporosis

Table 3 Mean and standard deviation of TPB model structures in the intervention and control group before and after intervention (n = 200)

Variable	Group (N = 100)	Before intervention M \(\pm\) SD	Two weeks after intervention M \(\pm\) SD	Two months after intervention M \(\pm\) SD	P-value
Knowledge	Experimental	18.29 \(\pm\) 4.32	31.12 \(\pm\) 4.20	39.04 \(\pm\) 4.10	0.001*
	Control	19.14 \(\pm\) 4.44	27.55 \(\pm\) 4.18	36.65 \(\pm\) 4.23	0.001*
	P-value	0.276	0.001**	0.001**
Attitude	Experimental	54.17 \(\pm\) 9.62	89.32 \(\pm\) 9.22	98.57 \(\pm\) 9.13	0.001*
	Control	52.87 \(\pm\) 9.64	55.16 \(\pm\) 9.08	57.32 \(\pm\) 9.12	0.194
	P-value	0. 308	0.001**	0.001**
Subjective norms	Experimental	40.28 \(\pm\) 8.96	88.39 \(\pm\) 8.84	122.57 \(\pm\) 8.58	0.001*
	Control	43.08 \(\pm\) 8.21	45.41 \(\pm\) 8.73	48.56 \(\pm\) 8.16	0.166
	P-value	0.247	0.001**	0.011**
Perceived behavioral control	Experimental	47.24 \(\pm\) 8.24	88.56 \(\pm\) 8.38	120.15 \(\pm\) 8.33	0.001*
	Control	46.31 \(\pm\) 8.29	48.58 \(\pm\) 8.39	51.30 \(\pm\) 8.45	0.213
	P-value	0.177	0.001**	0.001**
Behavioral intention	Experimental	32.22 \(\pm\) 4.14	54.44 \(\pm\) 4.72	60.26 \(\pm\) 4.12	0.001*
	Control	30.96 \(\pm\) 4.39	32.50 \(\pm\) 4.22	34.58 \(\pm\) 4.74	0.268
	P-value	0.362	0.001**	0.001**
Nutrition performance	Experimental	12.09 \(\pm\) 2.72	19.88 \(\pm\) 2.56	24.14 \(\pm\) 2.36	0.001*
	Control	11.67 \(\pm\) 2.83	12.38 \(\pm\) 2.61	14.29 \(\pm\) 2.53	0.185
	P-value	0.428	0.001**	0.001**
Physical activity	Experiential	9.12 \(\pm\) 1.20	16.75 \(\pm\) 1.42	18.94 \(\pm\) 1.68	0.001*
	Control	9.93 \(\pm\) 1.08	10.64 \(\pm\) 1.46	11.42 \(\pm\) 1.24	0.179
	P-value	0.433	0.001**	0.001**

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