The effect of educational program based on theory of planned behavior on promoting retinopathy preventive behaviors in patients with type 2 diabetes: RCT

Table 3 Comparison of the intervention and control groups, concerning TPB before and after the intervention

Group	Control		Intervention		P-value^a
Variable	Mean	SD	Mean	SD	P-value^a
Knowledge
Before	4.4	1.8	4.3	1.6	0.634
After	4.5	1.8	7.9	1.9	0.001
P-value^b	0.775		0.001
Attitude
Before	32.17	2.05	32.19	2.37
After	32.64	2.42	35.56	4.30
P-value^b	0.335		0.001
Subjective norm
Before	21.04	3.84	20.90	4.49	0.870
After	16.22	3.61	21.11	4.4	0.001
P-value^b	0.095		0.049
Perceived behavior control
Before	10.28	3.19	11.04	2.82	0.226
After	8.31	2.70	11.26	2.80	0.001
P-value^b	0.367		0.092
Behavioral intention
Before	25.78	2.76	25.5	3.8	0.80
P-value^b	23.53	2.8	30.2	5.6	0.001
After	0.137		0.001
Performance
Before	2.91	1.24	2.95	1.42	0.88
After	3.08	1.30	4.48	1.45	0.001
P-value^b	0.294		0.001

ISSN: 1472-6823