Table 1: Demographic characteristics of the students.

Total students521
Mean age ± SD
Age (years)
 15115 (22.1)
 16184 (35.3)
 17180 (34.5)
 1842 (8.1)
Gender
 Male277 (53.2)
 Female244 (46.8)
Year of education in high school
 First year202 (38.8)
 Second year173 (33.2)
 Third year146 (28)
Father’s education (%)
 Illiterate16 (3.1)
 Primary (1–9 years)73 (14)
 High school (10-11 years)102 (19.6)
 Diploma (12 years)215 (41.3)
 College/university education106 (20.4)
Mother’s education (%)
 Illiterate13 (2.5)
 Primary (1–9 years)94 (18)
 High school (10-11 years)112 (21.5)
 Diploma (12 years)217 (41.7)
 College/university education81 (15.5)
Father’s job (%)
 Worker74 (14.2)
 Employee135 (25.9)
 Teacher13 (2.5)
 Out of job243 (46.6)
 Retired27 (5.2)
 Others18 (3.5)
Mother’s job (%)
 Housewives440 (84.5)
 Employee23 (4.4)
 Teacher26 (5)
 Out of job13 (2.5)
 Others9 (1.7)
Family size
 3 persons46 (8.8)
 4 persons236 (45.3)
 5 persons144 (27.6)
 6 persons70 (13.4)
Household income
 <300000 Rial105 (20.2)
 300000–600000 Rial183 (35.1)
 600000–1000000 Rial104 (20)
 >1000000 Rial52 (10)
Socioeconomic status
 Low11 (2.1)
 Low-middle49 (9.4)
 Middle267 (50.7)
 Upper-middle167 (32.1)
 High26 (5)