Table 1.

Characteristics of participants (No = 879).

Age (Years)		Sex		Nationality
18–29 y	461(52.4%)	Male	271(30.8%)	Saudi	740 (84.2%)
30–49 y	351(39.9%)
50–64 y	61(6.9%)	Female	608(69.2%)	Non-Saudi	139 (15.8%)
Above 64	6(0.7%)
Location in Saudi Arabia		Employment		Medical Condition
Northern Region	31(3.5%)	Employed	430(48.9%)	Healthy	754(85.8%)
Southern Region	136(15.5%)
Central Region	467(53.1%)	Unemployed	449(51.1%)	Has systemic disease/s	125(14.2%)
Eastern Region	150(17.1%)
Western Region	95(10.8%)