Table 2.
Comparison of the bracket systems in terms of age and gender distribution, presence of EARR and treatment duration with Pearson Chi-Square test and Student's t-test
| Variable | Categories | Bracket System | P | |
|---|---|---|---|---|
| Self-ligating System (n=60) | Conventional System (n=240) | |||
| Age (years) | 12-17 [n (%)] | 48 (80.0) | 174 (72.5) | .236a |
| 18-30 [n (%)] | 12 (20.0) | 66 (27.5) | ||
| Gender | Female [n (%)] | 38 (63.3) | 168 (70.0) | .319a |
| Male [n (%)] | 22 (36.7) | 72 (30.0) | ||
| EARR after treatment | No [n (%)] | 58 (96.7) | 217 (90.4) | .117a |
| Yes [n (%)] | 2 (3.3) | 23 (9.6) | ||
| Duration of treatment (months) | Min–max | 14-48 | 8-49 | .775b |
| Mean ± SD | 31.68 ± 8.31 | 32.07 ± 9.50 | ||
aPearson chi-square test; bStudent’s t-test.
Min, minimum; Max, maximum; SD, standard deviation; n, number of patients.