Research Article
Self-Ligating Brackets and Their Impact on Oral Health-Related Quality of Life in Chinese Adolescence Patients: A Longitudinal Prospective Study
Table 1
Frequency distribution of self-ligating and conventional subjects’ characteristics.
| | Total | Self-ligating | Conventional | value (chi-square test) | % | () | % | () | % | () |
| Total | 100 | 150 | 50 | 75 | 50 | 75 | | Baseline IOTN-DHC
| | | | | | | | No or little need | 100 | 6 | 50 | 3 | 50 | 3 | 0.783 | Borderline need | 100 | 22 | 54 | 12 | 46 | 10 | Need | 100 | 122 | 53 | 65 | 47 | 57 | Sex | | | | | | | | Female | 100 | 92 | 52 | 48 | 48 | 44 | 0.564 | Male | 100 | 58 | 50 | 29 | 50 | 29 | Baseline IOTN-AC (normative)
| | | | | | | | No or little need | 100 | 4 | 50 | 2 | 50 | 2 | 0.689 | Borderline need | 100 | 20 | 55 | 11 | 45 | 9 | Need | 100 | 126 | 56 | 70 | 44 | 56 | Age (y) | | | | | | | | 13–15 | 100 | 48 | 46 | 22 | 54 | 26 | 0.826 | 16–18 | 100 | 102 | 51 | 52 | 49 | 50 | Social-economic class | | | | | | | | (high) | 100 | 134 | 56 | 75 | 44 | 59 | 0.346 | (low) | 100 | 12 | 42 | 5 | 58 | 7 |
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IOTN: index of orthodontic treatment need; DHC: dental health component; AC: aesthetic component.
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