Table 2 Feasibility/Acceptability, reliability and precision of the LW-CI-T2DM scale

Mean (SD)

11.53 (3.74)

18.80 (5.56)

11.00 (3.37)

14.82 (3.66)

15.35 (5.45)

71.53 (16.45)

Data Quality (% fully computable data)

100

98

99

100

97

94

Floor effect (%)

1.0

0.5

0.7

0.2

0.5

0.2

Ceiling effect (%)

19.8

6.2

10.8

13.2

9.7

1.7

Skewness

−0.78

−0.47

−0.54

−0.60

−0–24

−0.34

Cronbach’s alpha

0.82

0.77

0.71

0.72

0.82

0.90

Item-total correlation

0.36–0.67

0.21–0.50

0.32–0.53

0.16–0.58

0.16–0.60

–

Item homogeneity

0.53

0.33

0.40

0.36

0.42

–

Reproducibility (ICC)

0.93

0.93

0.90

0.91

0.96

0.96

Precision (SEM)

(1/2 SD)

0.92

(1.74)

1.52

(2.88)

1.05

(1.65)

1.01

(1.68)

1.08

(2.71)

3.34

(8.52)