Table 1.

Profile of 12-year-old participants

	Female		Male		Total		P
	N	Percentage	N	Percentage	N	Percentage
IOTN (DHC) treatment need
No need	168	55.1%	153	53.9%	321	54.5%	0.845
Borderline need	53	17.4%	53	18.7%	106	18.0%
Definite need	84	27.5%	78	27.5%	162	27.5%
IOTN (AC) treatment need
No need	249	81.6%	220	77.5%	469	79.6%	0.236
Borderline need	40	13.1%	49	17.3%	89	15.1%
Definite need	16	5.2%	15	5.3%	31	5.3%
DAI severity and treatment need
Normal or minor malocclusion- no treatment need or slight need	169	55.4%	143	50.4%	312	53.0%	0.118
Definite malocclusion- treatment selective	75	24.6%	68	23.9%	143	24.3%
Severe malocclusion- treatment highly desirable	41	13.4%	46	16.2%	87	14.8%
Very severe (handicapping) malocclusion-treatment mandatory	20	6.6%	27	9.5%	47	8.0%
ICON treatment need
No	201	65.9%	182	64.1%	383	65.0%	0.644
Yes	104	34.1%	102	35.9%	206	35.0%
ICON complexity
Easy	87	28.5%	86	30.3%	173	29.4%	0.898
Mild	158	51.8%	134	47.2%	292	49.6%
Moderate	32	10.5%	35	12.3%	67	11.4%
Difficult	16	5.2%	17	6.0%	33	5.6%
Very difficult	12	3.9%	12	4.2%	24	4.1%
PAR
Almost ideal occlusion	63	20.7%	59	20.8%	122	20.7%	0.530
Acceptable occlusion	137	44.9%	117	41.2%	254	43.1%
Malocclusion	105	34.4%	108	38.0%	213	36.2%
Periodontal status
CPI score = 0	43	14.1%	37	13.0%	80	13.6%	0.705
CPI score > 0	262	85.9%	247	87.0%	509	86.4%
Caries experience
< SiC Index value	254	83.3%	245	86.3%	499	84.7%	0.314
> =SiC Index value	51	16.7%	39	13.7%	90	15.3%
DMFT = 0	203	66.6%	200	70.4%	403	68.4%	0.314
DMFT > 0	102	33.4%	84	29.6%	186	31.6%
DMFT		Mean (SD)		Mean (SD)		Mean (SD)
	305	0.59 (1.01)	284	0.54 (1.04)	589	0.57 (1.02)	0.598

P: comparison for DMFT used the independent samples t test; others used the Mann-Whitney U test

SiC Index Significant Caries Index; SiC index value (SD) was 1.68 (1.12)

Results of statistical analysis