Table 1.

CPQ full questionnaire with 37 items and assessments of their impact on the domain reliability (N = 307)

Domain	Item code	Specified eventa	Corrected item-total correlationb	Cronbach’s alpha if item deleted	Loadings in 1-factor solution
OS	O1	Pain in teeth, lips, jaws or mouth	0.316	0.626	0.497
	O2	Bleeding gums	0.311	0.634	0.493
	O3	Mouth sores	0.223	0.647	0.402
	O4	Bad breath	0.421	0.584	0.679
	O5	Food caught in or between teeth	0.546	0.525	0.784
	O6	Food stuck to roof of mouth	0.530	0.576	0.761
FL	F1	Breathing trough mouth	0.465	0.658	0.600
	F2	Taken longer than others to eat a meal	0.307	0.695	0.449
	F3	Trouble sleeping	0.425	0.665	0.553
	F4	Difficulty to bite or chew food like apples, corn on the cob or steak	0.382	0.674	0.538
	F5	Difficulty to open mouth wide	0.450	0.667	0.672
	F6	Difficulty to say any words	0.337	0.687	0.462
	F7	Difficulty to eat foods you would like to eat	0.467	0.657	0.660
	F8	Difficulty to drink with a straw	0.346	0.685	0.561
	F9	Difficulty to drink or eat hot or cold foods	0.300	0.689	0.468
EWB	E1	Irritable or frustrated	0.320	0.755	0.247
	E2	Unsure of himself	0.174	0.758	0.165
	E3	Shy or embarrassed	0.541	0.732	0.568
	E4	Concerned what other people think about you	0.666	0.711	0.868
	E5	Worried that is less attractive than other people	0.647	0.703	0.866
	E6	Upset	0.608	0.712	0.816
	E7	Nervous or afraid	0.376	0.746	0.342
	E8	Worried that is less healthy than other people	0.644	0.708	0.848
	E9	Worried that is different than other people	0.575	0.716	0.808
SWB	S1	Missed school	0.626	0.847	0.724
	S2	Hard time paying attention in school	0.601	0.848	0.668
	S3	Difficulty doing homework	0.543	0.852	0.607
	S4	Avoiding to speak or read out loud in class	0.562	0.851	0.657
	S5	Avoiding activities like sports, clubs, drama, music, school trips	0.605	0.849	0.700
	S6	Avoiding to talk to other children	0.625	0.847	0.718
	S7	Avoiding smiling or laughing when around other children	0.464	0.864	0.552
	S8	Difficulty playing a musical instrument such as a recorder, flute, clarinet, trumpet	0.402	0.860	0.464
	S9	Avoiding to spend time with other children	0.628	0.847	0.727
	S10	Argued with other children or family	0.546	0.852	0.633
	S11	Teased or called names by other children	0.336	0.863	0.406
	S12	Left out by other children	0.556	0.853	0.649
	S13	Asked questions by other children	0.574	0.850	0.642

OS oral symptoms, FL functional limitations, EWB emotional well-being, SWB social well-being

^aFull wording of questions was “In the past 3 months, how often have you …(had/been + specified event) … because of your teeth/mouth?” and answer options were: (0) ‘never’; (1) ‘once/twice’; (2) ‘sometimes’; (3) ‘often’; (4) ‘every/almost every day’. ^b p < 0.001 for all values