Table 4.

Adjusted odds ratio of musculoskeletal symptoms according to psychosocial factors

Job stress	Model I		Model II		Model III
	Unadjusted OR*		Adjusted OR †		Adjusted OR ‡
	O.R.	95% CI	O.R.	95% CI	O.R.	95% CI
Physical Environment
Low risk		1.0		1.0		1.0
High risk	2.37	2.14 - 2.63	2.31	2.03 - 2.62	2.22	1.96 - 2.53
Job demand
Low risk		1.0		1.0		1.0
High risk	2.50	2.29 - 2.73	1.55	1.38 - 1.74	1.52	1.35 - 1.70
Insufficient job control
Low risk		1.0		1.0		1.0
High risk	1.13	1.02 - 1.25	0.98	0.88 - 1.01	0.99	0.88 - 1.10
Interpersonal conflict
Low risk		1.0		1.0		1.0
High risk	1.60	1.44 - 1.70	1.15	1.03 - 1.29	1.11	0.99 - 1.24
Job insecurity
Low risk		1.0		1.0		1.0
High risk	1.90	1.71 - 2.11	1.13	1.02 - 1.25	1.14	1.01 - 1.28
Organizational system
Low risk		1.0		1.0		1.0
High risk	2.22	2.01 - 2.47	1.24	1.10 - 1.38	1.37	1.21 - 1.56
Lack of reward
Low risk		1.0		1.0		1.0
High risk	1.92	1.73 - 2.13	1.23	1.08 - 1.39	1.15	1.01 - 1.31
Occupational climate
Low risk		1.0		1.0		1.0
High risk	2.16	1.94 - 2.39	1.33	1.19 - 1.49	1.24	1.11 - 1.40

^*: Model I:Odds ratio (O.R). confidence interval (CI).

^†: Model II: adjusted by age, tenure, exercise, smoking, drinking, marital status, job title, job class.

^‡: Model III: depression added at model II as a adjusted factor.