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Table 4 Cronbach’s coefficient alphas and correlation of four factors in the scale

From: Assessment of an instrument scale measuring the knowledge of antiretroviral therapy among people living with HIV

 

Cronbach’s coefficient alphas

Correlation

Factors

Itemsa

Meansb

SDc

Whole sample

split-half reliability

1d

2e

3f

ART medication

7

4.86

2.29

0.85

0.84

1.00

  

Drug adherence

2

1.31

0.93

0.95

0.95

0.60(P < 0.01)

1.00

 

Adverse effects

3

1.89

1.12

0.70

0.68

0.62(P < 0.01)

0.53(P < 0.01)

1.00

Treatment benefits

2

1.05

0.95

0.88

0.88

0.52(P < 0.01)

0.39(P < 0.01)

0.35(P < 0.01)

  1. a items of each dimension;
  2. b range: 2–7;
  3. c standard deviation;
  4. d ART medication;
  5. e Drug adherence;
  6. f Adverse effects