Table 4 Kendall’s tau-b measures (p-values in parentheses) for each pair of the 12 OHRQoL parameters in a sample of US undergraduate students (n = 372)

1.

Biting difficulty

0.57

(< 0.0001)

0.22

(< 0.0001)

0.23

(< 0.0001)

0.28

(< 0.0001)

0.35

(< 0.0001)

0.20

(0.0001)

0.28

(< 0.0001)

0.21

(< 0.0001)

0.17

(0.001)

0.21

(< 0.0001)

0.20

(0.0001)

2.

Chewing difficulty

1.00

0.17

(0.0007)

0.16

(0.0012)

0.20

(0.0001)

0.18

(0.0004)

0.18

(0.0004)

0.36

(< 0.0001)

0.29

(< 0.0001)

0.21

(< 0.0001)

0.25

(< 0.0001)

0.23

(< 0.0001)

3.

Speech or pronunciation difficulty

1.00

0.20

(< 0.0001)

0.09

(0.0546)

0.20

(0.0001)

0.13

(0.0075)

0.19

(0.0002)

0.23

(< 0.0001)

0.20

(0.0001)

0.16

(0.0014)

0.27

(< 0.0001)

4.

Dry mouth

1.00

0.20

(< 0.0001)

0.19

(0.0001)

0.19

(0.0001)

0.19

(0.0001)

0.14

(0.0054)

0.15

(0.0028)

0.16

(0.0010)

0.23

(< 0.0001)

5. Embarrassed with dental appearance

1.00

0.37

(< 0.0001)

0.59

(< 0.0001)

0.24

(< 0.0001)

0.20

(< 0.0001)

0.13

(0.0067)

0.22

(< 0.0001)

0.28

(< 0.0001)

6.

Feeling intense with tooth problems

1.00

0.31

(< 0.0001)

0.30

(< 0.0001)

0.34

(< 0.0001)

0.24

(< 0.0001)

0.26

(< 0.0001)

0.31

(< 0.0001)

7.

Avoidance of smiling

1.00

0.20

(< 0.0001)

0.21

(< 0.0001)

0.13

(0.0078)

0.18

(0.0003)

0.27

(< 0.0001)

8.

Interrupted sleep

1.00

0.57

(< 0.0001)

0.45

(< 0.0001)

0.36

(< 0.0001)

0.49

(< 0.0001)

9.

Taking days off

1.00

0.54

(< 0.0001)

0.44

(< 0.0001)

0.55

(< 0.0001)

10.

Difficulty doing usual activities

1.00

0.53

(< 0.0001)

0.56

(< 0.0001)

11.

Less tolerant of close people

1.00

0.67

(< 0.0001)

12.

Reduced participation in social activities

1.00