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Table 8 Internal consistency and ICC of TCMECQ-C (Third Version)

From: Validation of the Cantonese version of the Traditional Chinese Medicine (TCM) Body constitution Questionnaire in elderly people

Item

Corrected item-total correlation coefficient

Cronbach's alpha coefficient if item deleted

BC 1

(Cronbach’s alpha coefficient: 0.67)

[Intra-class correlation coefficientc*: 0.75b (0.69, 0.81)]

 2

0.43

0.62

 3

0.52

0.55

 4

0.46

0.59

 14

0.39

0.64

BC 2

(Cronbach’s alpha coefficient: 0.84)

[Intra-class correlation coefficientc*: 0.81b (0.76, 0.85)]

 11

0.46

0.84

 12.1

0.56

0.82

 12.2

0.70

0.80

 12.3

0.69

0.80

 12.4

0.63

0.81

 13

0.60

0.81

 29

0.54

0.82

BC 3

(Cronbach’s alpha coefficient: 0.59)

[Intra-class correlation coefficientc*: 0.74b (0.68, 0.79)]

 10

0.21

0.63

 21

0.54

0.38

 26

0.49

0.42

 31

0.28

0.59

BC 4

(Cronbach’s alpha coefficient: 0.34)

[Intra-class correlation coefficientc*: 0.79b (0.74, 0.84)]

 9

0.28

0.15

 16

0.14

0.31

 28

0.13

0.33

 32

0.16

0.29

BC 5

(Cronbach’s alpha coefficient: 0.44)

[Intra-class correlation coefficientc*: 0.73b (0.67, 0.78)]

 23

0.23

0.39

 25

0.23

0.40

 27

0.31

0.30

 30

0.24

0.38

BC 6

(Cronbach’s alpha coefficient: 0.56)

[Intra-class correlation coefficientc*: 0.87b (0.84, 0.90)]

 19

0.32

0.51

 22

0.06

0.60

 24.1

0.50

0.37

 24.2

0.38

0.46

 33

0.33

0.50

BC 7

(Cronbach’s alpha coefficient: 0.89)

[Intra-class correlation coefficientc*: 0.82b (0.76, 0.86)]

 5

0.71

0.87

 6

0.74

0.86

 7

0.73

0.86

 8.1

0.75

0.86

 8.2

0.72

0.87

BC 8

(Cronbach’s alpha coefficient: 0.76)

[Intra-class correlation coefficientc*: 0.70b (0.63, 0.76)]

 15

0.32

0.77

 17.1

0.39

0.74

 17.2

0.42

0.74

 17.3

0.57

0.71

 17.4

0.58

0.72

 17.5

0.67

0.69

 17.6

0.57

0.71

 18

0.25

0.76

 20

0.24

0.76

BC 9

(Cronbach’s alpha coefficient: 0.73)

[Intra-class correlation coefficientc*: 0.84b (0.80, 0.88)]

 1

0.59

0.65

 2a

0.52

0.67

 4a

0.45

0.69

 5a

0.47

0.69

 13a

0.46

0.71

  1. BC 1: Qi-deficiency Constitution, BC 2: Yang-deficiency Constitution, BC 3: Yin-deficiency Constitution, BC 4: Phlegm-dampness Constitution, BC 5: Dampness-heat Constitution, BC 6: Stagnant Blood Constitution, BC 7: Stagnant Qi Constitution, BC 8: Inherited Special Constitution, BC 9: Balanced Constitution
  2. *p < 0.001
  3. aItem with reverse scoring: (1) “No” reversed to “All the time”, (2) “Slightly” reversed to “Often”, (3) “Sometimes” remained “Sometimes”, (4) “Often” reversed to “Slightly”, (5) “All the time” reversed to “No”
  4. bThe estimator is the same, whether the interaction effect is present or not
  5. cType A intra-class correlation coefficients using an absolute agreement definition
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