Participants’ characteristics. n= 694
| Variables | n (%) |
|---|---|
| Gender | |
| Male | 388 (55.9) |
| Female | 306 (44.1) |
| Age, years, mean ± SD | 8.6±4.5 |
| Age groups | |
| <1 year | 28 (4.0) |
| 1 to <6 years | 229 (33.0) |
| 6 years to <12 years | 289 (41.6) |
| 12 years to 18 years | 148 (21.3) |
| Distribution of patients by centers | |
| Educational | 478 (68.9) |
| Governmental | 216 (31.1) |