Table 2: Global adjustment indicators of the measurement models.

Models

χ2

gl

χ2/gl

p

CFI

TLI

RMSEA

RMSEA

CI 90%

Low-high

IPQ-R

( = 0.73-0.87)

518.795

317

1.6

0.000

0.929

0.921

0.046

0.038-0.052

BMQ

( = 0.76-0.80)

143.791

87

1.6

0.001

0.967

0.961

0.050

0.044-0.076

MARS-A

( = 0.81)

7.790

4

1.9

0.100

0.986

0.965

0.073

0.000-0.149

ACT

( = 0.85)

6.972

5

1.3

0.223

0.996

0.993

0.039

0.000-0.100

CFI = comparative fit index.

TLI = Tucker-Lewis index.

RMSEA = root mean square error of approximation.

IPQ-R = Illness perception questionnaire-revised.

BMQ = beliefs about medicines questionnaire-specific.

MARS-A = medication adherence report scale-asthma.

ACT = asthma control test.