Independent variable | Assignment |
Social status Occupational risk Title Age Gender School performance Class cadre experience | Glorious = 1, superior to other professional = 2, not respected = 3; Very large = 1, relatively large = 2, general = 3, very small = 4; Have title = 1, no title = 2; <25 = 1, ≥25 = 2; Male = 1, female = 2; Outstanding = 1, good = 2, general = 3, poor = 4; Have =1, no = 2. |