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Table 4 Results of repeated-measures ANOVA (group × time) tests for outcome measures at pre- and post-tests (N = 110)

From: Effects of motivational interviewing-based adherence therapy for schizophrenia spectrum disorders: a randomized controlled trial

 

AT (n = 54)

TAU (n = 56)

 
 

T0

T1

T2

T0

T1

T2

 

Effect size

Instrument

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Fc, P

ITAQ

9.12

6.14

11.13

6.89

13.88

6.80

9.33

3.31

9.89

5.81

9.79

6.21

6.58, 0.021

0.51

PANSS

80.19

11.10

74.01

15.10

68.12

14.81

81.13

12.01

81.18

15.23

83.45

14.13

7.32, 0.008

0.71

Positive Symptoms

18.02

4.89

16.13

4.54

14.65

3.98

18.21

4.12

18.23

4.51

18.98

5.86

7.28, 0.008

0.70

Negative Symptoms

20.68

5.01

18.34

5.62

16.71

5.81

20.82

5.76

20.96

5.98

21.38

6.12

7.81, 0.006

0.75

SLOF

140.01

18.22

150.80

22.38

168.12

28.10

138.34

17.18

138.11

20.88

145.12

34.20

6.89, 0.014

0.68

ARS

1.48

0.98

2.12

1.08

3.08

1.24

1.39

1.01

1.45

1.00

1.48

1.01

7.45, 0.007

0.72

Re-hospitalization

              

Numbera

1.41

0.98

1.31

0.92

1.18

1.10

1.50

0.92

1.38

1.09

1.51

0.99

5.01, 0.030

0.48

Durationb

9.12

2.98

8.81

5.11

8.18

4.02

10.01

4.02

10.05

8.11

9.01

8.85

3.68, 0.090

0.26

  1. AT: Adherence Therapy, ARS: Adherence Rating Scale; possible score range 1 to 5, with higher scores indicating better adherence to medication, ITAQ: Insight and Treatment Attitudes Questionnaire; possible score range from 0 to 22, with higher scores indicating better insight, PANSS: Positive and Negative Syndrome Scale; possible score range from 30 to 210, with higher scores indicating greater severity of symptoms; the possible scores of Positive and Negative Symptoms subscales range from 7 to 49, SLOF: Specific Levels of Functioning scale; possible score range from 43 to 215, with higher scores indicating higher level of psychosocial and self-care functioning, TAU: Treatment as usual, T0: Baseline measure at recruitment, T1: First post-test at immediately after completion of the interventions, T2: Second post-test at six months after interventions
  2. a Average number of readmissions to a psychiatric hospital or inpatient unit over the past four months, b Duration of readmissions to a psychiatric hospital or inpatient unit in terms of average number of days of hospital stay over four months. cF values (group × time) for repeated-measures ANOVA test, df = 1,109