Table 1.

Comparison of socio-demographic and self-perceived variables between face-to-face interview (FTFI) and self-administrated questionnaire (SAQ) groups

Characteristics	FTFI group (n = 72)		SAQ group (n = 72)		p value
	n	%	n	%
Sex*					0.614
Boys	33	45.8	30	41.7
Girls	39	54.2	42	58.3
Social deprivation*					0.731
Low deprivation	26	36.1	28	38.9
Higher deprivation	46	63.9	44	61.1
Age					0.959
Mean ± S.D.	12.18 ± 1.59		12.24 ± 2.02
Self-rated oral health status					0.508
Poor	4	5.6	7	9.8
Fair	24	33.3	24	33.3
Good	44	61.1	41	56.9
Self-perceived need to wear braces					0.947
A little	19	26.4	17	23.6
Maybe	23	31.9	26	36.1
A lot	30	41.7	29	40.3
Happiness with dental appearance					0.554
Unhappy	36	50.0	37	51.4
No bothered	19	26.4	24	33.3
Happy	17	23.6	11	15.3
Frequency of thinking of dental appearance					0.422
Not often	17	23.6	13	18.1
Sometimes	28	38.9	42	58.3
A lot	27	37.5	17	23.6

* Chi-square was used instead of the Mann-Whitney test