Table 3.

Spearman's correlation coefficients between OHIP-J14 items and chewing function score

OHIP-J14 item1			Spearman's rho*	Proportion of "often" or "very often"(%)
functional limitation	1	Trouble pronouncing any words	-0.38	8.38
	2	Sense of taste has worsened	-0.35	6.13
Physical pain	3	Had painful aching in your mouth	-0.31	5.32
	4	Uncomfortable to eat any foods	-0.43	7.98
Psychological discomfort	5	Been self conscious	-0.31	11.25
	6	Felt tense	-0.26	4.50
Physical disability	7	Diet has been unsatisfactory	-0.42	4.29
	8	Had to interrupt meals	-0.37	3.07
Psychological disability	9	Difficult to relax	-0.33	3.89
	10	Been a bit embarrassed	-0.33	4.29
Social disability	11	Been a bit irritable with other people	-0.17	2.45
	12	Had difficulty doing your usual jobs	-0.26	2.86
Handicap	13	Felt that life in general was less satisfying	-0.31	4.70
	14	Been totally unable to function	-0.27	2.04

* All coefficients p < 0.001

¹ Full questionnaire is shown in the appendix