Table 3.

Summary of previous epidemiologic studies on malocclusion assessment in Korea

Author (year)	Assessment	Sample	Size	Prevalence (%)	Included as variables
					Angle classification	Sex	Age
Suhr et al.7 (1984)	Angle classification	7–22 year old students in Seoul	8,989	61	Yes	Yes	Yes
Sohn et al.8 (1993)	HLD, TPI, and HMAR	Elementary students from Seoul, Gwangju, Hwasun, and Anyang	649	Not applicable	No	Yes	No
Kwon et al.9 (1989)	Angle classification	Kyungpook National University Dental Hospital	1,795	Not applicable	Yes	Yes	Yes
Yang10 (1995)	Angle classification	Seoul National University Dental Hospital	6,788	Not applicable	Yes	Yes	Yes
Baik et al.11 (1995)	Angle classification	Yonsei University Dental Hospital	2,155	Not applicable	Yes	Yes	Yes
Yu et al.12 (1999)	Angle classification	Yonsei University Dental Hospital	9,159	Not applicable	Yes	Yes	Yes
Hwang et al.13 (2001)	Angle classification	Chosun University Dental Hospital	3,070	Not applicable	Yes	Yes	Yes
Im et al.14 (2003)	Angle classification	Seoul National University Dental Hospital	676	Not applicable	Yes	Yes	Yes
Chung and Lee15 (2006)	Angle classification	Yeungnam University Hospital	993	Not applicable	Yes	Yes	Yes
Yoon16 (2008)	Angle classification	Dankook University Dental Hospital	4,043	Not applicable	Yes	Yes	Yes
Jung18 (2009)	Angle classification	Private clinics	1,620	Not applicable	Yes	Yes	Yes
Piao et al.17 (2016)	Angle classification	Yonsei University Dental Hospital	7,476	Not applicable	Yes	Yes	Yes
Choi19 (2017)	Angle classification	Private clinic	1,254	Not applicable	Yes	Yes	Yes
This study	Subjective assessment	Nationwide sample	165,996	18.7	No	Yes	Yes

HLD, Handicapping labiolingual deviation; TPI, treatment priority index; HMAR, handicapped malocclusion assessing record.