Organizations with more than 300 employees had high job demands than organizations with less than 300 employees, the private sector has a high proportion of high job demand than the public sector (p < 0.001). Organizations with more than 300 employees and the public sector had high job control (p < 0.001). The high social support proportion was higher in the organizations with more than 300 employees, and the high social support proportion was high in the public sector, showing a significant difference (p < 0.001). Job insecurity and the number of employees showed no significant difference (p = 0.172) (Table 3).Table 3Psychosocial risk factors of study subjects by Occupational characteristicsNumber of employeesSectorTotal<300 (%)≥300 (%)Public (%)Private (%)Total19064a (100%)17436 (91.5)1628 (8.5)2399 (12.6)16665 (87.4)Job demand High8238 (43.2)7398 (42.4)840 (51.6)*** 768 (32.0)7470 (44.8) *** Low10826 (56.8)10038 (57.6)788 (48.4)1630 (68.0)9196 (55.2)Job control High10451 (54.8)9476 (54.3)975 (59.9) *** 1393 (58.1)9059 (54.4) *** Low8613 (45.2)7960 (45.7)653 (40.1)1006 (41.9)7607 (45.6)Social support High10784 (56.6)9557 (54.8)1227 (75.4) *** 1527 (63.7)9257 (55.5) *** Low8280 (43.4)7879 (45.2)401 (24.6)872 (36.3)7408 (44.5)Job insecurity High6072 (31.8)5578 (32.0)494 (30.3)627 (26.1)5445 (32.7)*** Low12992 (68.2)11858 (68.0)1134 (69.7)1772 (73.9)11221 (67.3)Lack of reward High6972 (36.6)6122 (35.1)850 (52.2)*** 1216 (50.7)5757 (34.5)*** Low12092 (63.4)11314 (64.9)778 (47.8)1183 (49.3)10908 (65.5) *** p < 0.001 aweighted frequency