Table 3 Construct validity: performance of CPQ_11-14 versions against global questions

Northland

Brunei

Brazil

Otago

Self-rated oral health

   Excellent

9.4 (4.2)^a

15.6 (7.6)^a

7.4 (6.0)^b

9.6 (6.7)^b

   Very good

9.1 (6.8)

16.5 (9.0)

8.3 (5.7)

10.9 (7.0)

   Good

11.4 (6.8)

15.6 (8.3)

9.4 (7.2)

14.1 (7.3)

   Fair/Poor

16.3 (9.0)

18.7 (9.0)

15.7 (10.0)

19.7 (10.1)

Spearman's rho^c

0.28

0.11^d

0.38

0.37

Impact on quality of life

   Not at all

8.9 (5.7)^a

13.89 (8.3)^a

7.6 (6.1)

10.7 (5.6)^b

   Very little

12.4 (6.6)

16.3 (9.1)

13.8 (8.8)

13.9 (7.1)

   Some

14.6 (7.5)

18.5(7.7)

16.2 (10.3)

18.2 (9.3)

   A lot/Very much

15.3 (0.9)

17.8 (9.8)

17.4 (10.2)

24.8 (12.3)

Spearman's rho^c

0.32

0.19

0.39

0.37