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Table 2 Mean and standard deviation of knowledge scores, prevention behaviors, attitude, mental norms, perceived behavioral control and behavioral intention in the intervention and control group before and after intervention

From: Effect of educational program based on theory of planned behavior on osteoporosis preventive behaviors: a randomized clinical trial

Variables

Group

The level

Mean ± Sd

t

P-Value*

Mean Diffrence

T

P-Value**

Knowledge

Intervention

PreTest

18.06 ± 4.54

−8.46

0.001

6.7 ± 4.48

7.93

0.001

Post Test

24.7 ± 2.19

Control

PreTest

20.9 ± 3.7

0.524

0.604

−0.187 ± 2.02

Post Test

20.7 ± 3.4

Prevention behaviors

Intervention

PreTest

37.9 ± 5.6

−5.8

0.001

5.6 ± 5.5

5.94

0.001

Post Test

43.5 ± 4.5

Control

Pretest

41.9 ± 3.9

1.247

0.222

−0.281 ± 1.2

Post Test

41.6 ± 3.9

Attitude

Intervention

Pretest

33.4 ± 3.9

−8.23

0.001

7.28 ± 5

8.09

0.001

Post Test

40.7 ± 4.6

Control

Pretest

35.2 ± 3.7

0.432

0.669

−0.093 ± 1.2

Post Test

35.09 ± 3.7

Subjective norms

Intervention

Pretest

13.3 ± 3.02

−7.6

0.001

4.2 ± 3.1

6.5

0.001

Post Test

17.5 ± 2.3

Control

Pretest

12.5 ± 2.47

2.272

0.060

0.406 ± 1.01

Post Test

12.9 ± 2.2

Perceived behavioral control

Intervention

Pretest

29.3 ± 2.45

−6.9

0.001

5.5 ± 4.5

6.8

0.001

Post Test

34.8 ± 3.81

Control

Pretest

30.1 ± 2.8

0.533

0.598

−0.098 ± 0.99

Post Test

30.03 ± 2.7

Behavioral intention

Intervention

Pretest

25.1 ± 3.3

−6.7

0.001

5.6 ± 4.7

33.9

0.001

Post Test

30.8 ± 4.3

Control

Pretest

27.2 ± 3.7

−1.063

0.296

0.187 ± 0.99

Post Test

27.3 ± 3.3

  1. * Paired T Test
  2. ** Independent Samples Test