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Table 5 Cronbach alpha and correlation between SDQ test scores (child's-self-report and parent proxy report)

From: Effects of phone versus mail survey methods on the measurement of health-related quality of life and emotional and behavioural problems in adolescents

  

Children's self-report

Parent's proxy-report

  

EMO

CON

HYP

PEE

PRO

EMO

CON

HYP

PEE

PRO

  

C1

C2

C3

C4

C5

P1

P2

P3

P4

P5

 

alpha

0.66

0.34

0.66

0.36

0.64

0.72

0.53

0.80

0.57

0.59

C1

0.66

 

0.32

0.28

0.27

0.04

0.31

0.08

-0.01

0.16

0.03

C2

0.36

0.25

 

0.42

0.19

-0.29

0.21

0.31

0.28

0.14

-0.15

C3

0.68

0.27

0.30

 

0.16

-0.20

0.14

0.19

0.31

0.04

0.00

C4

0.46

0.31

0.17

-0.03

 

-0.18

0.16

0.10

0.13

0.42

-0.04

C5

0.55

0.10

-0.26

-0.16

-0.14

 

-0.03

-0.10

-0.18

-0.10

0.22

P1

0.65

0.40

0.15

0.20

0.19

0.04

 

0.31

0.34

0.33

-0.10

P2

0.57

0.10

0.35

0.27

0.08

-0.14

0.31

 

0.52

0.28

-0.28

P3

0.79

0.04

0.22

0.47

0.00

-0.13

0.37

0.51

 

0.29

-0.22

P4

0.66

0.11

0.09

0.01

0.44

-0.10

0.38

0.32

0.23

 

-0.19

P5

0.68

0.02

-0.15

-0.08

-0.09

0.33

-0.07

-0.37

-0.26

-0.23

 
  1. Lower triangular matrix = mail; upper triangular matrix = phone administration
  2. a statistically significant deviation after Fisher-Z Transformation;
  3. EMO = Emotional; CON = Conduct; HYP = Hyperactivity; PEE = Peer Problems; PRO = Prosocial;
  4. Alpha for the self-report Total Difficulties Score was 0.71 (mail) and 0.73 (phone);
  5. Alpha for the Parent-report Total Difficulties Score was 0.82 (mail) and 0.82 (phone);
  6. Correlation between Self-report and proxy report Total Difficulties Score was r = 0.43 (mail) and 0.37 (phone)
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BMC Public Health

ISSN: 1471-2458

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