Table 4

Previous studies reporting frequency of definite need for orthodontic treatment in young adults
Study
 Place
 n
 Age
 Index
 Definite need
 Patients with HPOT
Index for Orthodontic Treatment Need (IOTN)
Present study
 Peru
 281
 16 – 25
 AC
 1.8
 ---




DHC
 29.9
 ---
Hassan (2006) [33]
 Saudi Arabia
 743
 17–24
 AC
 16.1
 ---




DHC
 71.6
 ---
Soh & Sandham (2004) [15]
 Asia
 339 males
 17 – 22
 AC
 29.2
 ---




DHC
 50.1
 ---
Kerosuo et al (2004) [25]
 Kuwait
 139
 14 – 18
 AC
 1.4
 Included




DHC
 28.1
 Included
Klages et al (2004) [27]
 Germany
 148
 18 – 30
 AC
 0.0
 Included
Kerosuo et al (2000) [23]
 Finland
 281
 18 – 19
 AC
 0.0
 ---




DHC
 12.8
 ---
Tuominen et al (1995) [21]
 Finland
 89
 16 – 19
 DHC
 11.2
 Included
Other Indexes for Orthodontic Treatment Need
Bernabé & Flores-Mir (2006) [28]
 Peru
 267
 16 – 25
 DAI*
 32.6
Baca-Garcia et al (2004) [26]
 Spain
 744
 14 – 20
 DAI
 21.1
 ---
Onyeasco et al (2003) [24]
 Nigeria
 104
 16 – 25
 DAI
 44.2
 ---
Stenvik et al (1996) [22]
 Norway
 50
 18
 NOTI**
 0.0
 ---
Searcy & hisick (1994) [20]
 Sweden
 576 males
 18 – 24
 TPI*
 16.3
 Included
Espeland et al (1993) [18]
 Norway
 100
 18
 NOTI
 8.0
 Included
Espeland et al (1993) [19]
 Norway
 144
 17 – 18
 NOTI
 1.4
 ---

HPOT = History of previous orthodontic treatment

* Only 'severe malocclusion' and 'handicapping malocclusion' are presented

** Only 'great need' and 'very great need' are presented

Bernabé and Flores-Mir Head & Face Medicine 2006 2:22   doi:10.1186/1746-160X-2-22