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)

OHRQoL Parameter	1. Biting difficulty	2. Chewing difficulty	3. Speech or pronunciation difficulty	4. Dry mouth	5. Embarrassed with dental appearance	6. Feeling intense with tooth problems	7. Avoidance of smiling	8. Interrupted sleep	9. Taking days off	10. Difficulty doing usual activities	11. Less tolerant of close people	12. Reduced participation in social activities
1. Biting difficulty	1.00	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