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Table 3 Comparison of scores of components of the IMB among participants in the intervention and control groups before and after the implementation of the program

From: Application of the information-motivation-behavioral skills model to improve medication adherence among older adults with type 2 diabetes: findings from a quasi-experimental study in Kermanshah, Iran

 

Before Intervention

After Intervention

Paired Sample t-Test

Average rate of change

Effect Size

Information

     

Intervention Group

15.54 (3.15)

19.38 (3.06)

< 0.001

3.84

1.3 (Very large)

Control Group

14.86 (3.23)

15.06 (3.37)

0.713

0.2

 

Independent t-test

0.289

< 0.001

   

Attitude

     

Intervention Group

14.24 (2.92)

15.38 (2.27)

0.014

1.14

0.65 (Large)

Control Group

13.28 (3.64)

13.76 (2.72)

0.143

0.48

 

Independent t-test

0.149

0.002

   

Subjective Norms

    

Intervention Group

8.44 (1.32)

8.20 (1.55)

0.379

-0.24

0.11 (Small)

Control Group

7.98 (1.22)

7.84 (1.62)

0.516

-0.11

 

Independent t-test

0.074

0.259

   

Self-efficacy

     

Intervention Group

10.76 (1.87)

11.26 (1.66)

0.088

0.5

0.67 (Large)

Control Group

10.22 (2.18)

10.06 (1.87)

0.545

-0.16

 

Independent t-test

0.189

0.001

   

Individual’s objective skills

    

Intervention Group

31.66 (4.07)

33.66 (4.45)

0.008

2

0.72 (Large)

Control Group

30.14 (5.49)

30.08 (5.53)

0.957

-0.06

 

Independent t-test

0.121

0.001

   

Medication adherence

     

Intervention Group

16.92 (2.80)

19.76 (3.10)

< 0.001

2.84

1.15 (Very large)

Control Group

16.12 (2.47)

16.50 (2.54)

0.252

0.38

 

Independent t-test

0.133

< 0.001