Table 1.
General characteristics of the 7931 students
| Age (years) | Median 11 (range, 5-18) | Mean 11.22±2.62 |
|---|---|---|
| Gender | Male | 2943 (37%) |
| Female | 4988 (63%) | |
| Father’s education no data=130 (1.6%) | Illiterate | 582 (7.3%) |
| Primary | 1157 (14.6%) | |
| Intermediate | 1241 (15.6%) | |
| High school | 2326 (29.3%) | |
| Bachelors | 1992 (25.1%) | |
| Master’s/doctorate | 502 (6.3%) | |
| Mother’s education no data=135 (1.7%) | Illiterate | 1003 (12.6%) |
| Primary | 1361 (17.2%) | |
| Intermediate | 1308 (16.5%) | |
| High school | 1963 (24.8%) | |
| Bachelors | 2060 (26.0%) | |
| Master’s/doctorate | 1003 (12.6%) | |
| Family income no data=374 (4.7%) | No income | 407 (5.1%) |
| <1500 US $ | 1549 (19.5%) | |
| 1500–2500 US $ | 2277 (28.7%) | |
| 2500–5000 US $ | 2218 (28.0%) | |
| 5000–8000 US $ | 719 (9.1%) | |
| >8000 US $ | 386 (4.9%) | |
| Occupation | Unemployed | 2117 (26.7%) |
| Worker | 4567 (57.6%) | |
| Office clerk | 693 (8.7%) | |
| Trader/professional | 553 (7.0%) | |
| Residence No data=126 (1.6%) | Traditional house | 1067 (13.5%) |
| Apartment | 2592 (32.7%) | |
| Villa | 4107 (51.8%) | |
| Palace | 38 (0.5%) | |
| Socioeconomic status | Low socioeconomic | 328 (4.1%) |
| Lower middle socioeconomic | 2581 (32.5%) | |
| Higher middle socioeconomic | 4317 (54.4%) | |
| High socioeconomic | 705 (8.9%) |