| Variables | Mean±SD | Results | |
|---|---|---|---|
| Sex | Male | 16.33±2.59 | t=-0.059 p-vale= 0.953  | 
| Female | 16.38±1.71 | ||
| Marital Status | Single | 15.16±3.02 | t=-0.942 p-value=0.242  | 
| Married | 16.48±1.78 | ||
| Age group (year) | <31 | 18.40±1.66 | F=2.7 p-value=0.089  | 
| 31-40 | 20.11±1.70 | ||
| 41-50 | 16.94±2.50 | ||
| 51-60 | 14.02±2.02 | ||
| >60 | 13.41±2.02 | ||
| Type of employment | Formal and official | 15.85±1.49 | F=2.43 p-value=0.068  | 
| Contractual | 15.74±2.75 | ||
| Private | 14.81±3.72 | ||
| Treaty | 15.61±2.42 | ||
| Apprentice program | 11.20±0.824 | ||
| Work Experience (year) | <5 | 16.43±2.59 | F=0.516 p-value=0.724  | 
| 6-15 | 14.36±1.55 | ||
| 16-25 | 16.31±3.04 | ||
| 26-35 | 16.79±1.85 | ||
| >35 | 16.62±1.92 | ||