Table 1.

Descriptive statistics of the study sample

Variable	Categories
Age (years)	Min–max	12-30
	Mean ± SD	16.13 ± 4.08
	12-17 years [n (%)]	222 (74.0)
18-30 years [n (%)]	78 (26.0)
Gender	Female [n (%)]	206 (68.7)
Male [n (%)]	94 (31.3)
EARR after treatment	No [n (%)]	275 (91.7)
Yes [n (%)]	25 (8.3)
Number of EARR per patient (n = 25)	Min–max	1-10
Mean ± SD	4.00 ± 2.06
Bracket system	Self-ligating system [n (%)]	60 (20.0)
Conventional system [n (%)]	240 (80.0)
Duration of treatment (months)	Min–max	8-49
Mean ± SD	31.99 ± 9.26

Min, minimum; Max, maximum; SD, standard deviation; n, number of patients