Orthodontic Treatment Need and the Psychosocial Impact of Malocclusion in 12-Year-Old Hong Kong Children

Table 1

Normative orthodontic treatment need assessed with the IOTN-AC, DAI, ICON, and PAR.

	No definite treatment need	Definite treatment need
IOTN-AC	89.1% (n = 594)	10.9% (n = 73)
IOTN-DHC	52.2% (n = 348)	47.8% (n = 319)
DAI	69.4% (n = 463)	30.6% (n = 204)
ICON	62.1% (n = 414)	37.9% (n = 253)
PAR	88.6% (n = 591)	11.4% (n = 76)

Definite treatment need: IOTN-AC: categories 8-10, IOTN-DHC: categories 4 and 5, DAI: score ≥36, ICON: >42, PAR: initial score ≥25.