Table 4 Relationship between psychological and work‐related psychosocial factors and new‐onset knee pain among newly appointed workers.

	New‐onset knee pain at 1 year		New‐onset knee pain at 2 years		Relative risk* (95% CI)
	Yes	No	Yes	No
General psychological distress (GHQ tertiles)
Low	20 (6.4%)	291 (93.6%)	17 (8.5%)	182 (91.5%)	1.0
Medium	13 (7.3%)	165 (92.7%)	24 (13.0%)	161 (87.0%)	1.4 (0.9 to 2.2)
High	22 (12.6%)	153 (87.4%)	12 (9.0%)	121 (91.0%)	1.6 (1.01 to 2.5)
Job satisfaction
Satisfied	47 (8.1%)	536 (91.9%)	41 (9.8%)	377 (90.2%)	1.0
Neither	6 (10.2%)	53 (89.8%)	7 (11.9%)	52 (88.1%)	1.2 (0.7 to 2.2)
Dissatisfied	2 (9.5%)	19 (90.5%)	4 (14.8%)	23 (85.2%)	1.4 (0.6 to 3.0)
Job monotonous or repetitive
Rarely	46 (7.9%)	533 (92.1%)	37 (8.8%)	384 (91.2%)	1.0
>Half the time	9 (10.7%)	75 (89.3%)	15 (18.1%)	68 (81.9%)	1.7 (1.04 to 2.6)
Job hectic
Rarely	38 (8.2%)	428 (91.8%)	36 (9.6%)	340 (90.4%)	1.0
>Half the time	17 (8.6%)	181 (91.4%)	16 (11.9%)	119 (88.1%)	1.1 (0.7 to 1.6)
Job stressful
Rarely	42 (8.2%)	472 (91.8%)	43 (10.1%)	382 (89.9%)	1.0
>Half the time	13 (8.7%)	137 (91.3%)	9 (10.5%)	77 (89.5%)	1.2 (0.8 to 1.9)
Have control over job
Often	30 (7.1%)	391 (92.9%)	32 (8.4%)	347 (91.6%)	1.0
Sometimes	15 (8.8%)	155 (91.2%)	15 (13.8%)	94 (86.2%)	1.4 (0.9 to 2.0)
Seldom	10 (14.5%)	59 (85.5%)	5 (22.7%)	17 (77.3%)	1.7 (1.03 to 2.9)
Able to learn new things at work
Often	45 (8.1%)	509 (91.9%)	33 (8.6%)	350 (91.4%)	1.0
Sometimes	8 (10.5%)	68 (89.5%)	11 (12.2%)	79 (87.8%)	1.3 (0.7 to 2.2)
Seldom	2 (5.7%)	33 (94.3%)	8 (21.1%)	30 (78.9%)	1.8 (0.8 to 3.9)
Satisfied with the amount of support from colleagues
Satisfied	49 (8.3%)	541 (91.7%)	43 (10.2%)	380 (89.8%)	1.0
Neither	6 (8.5%)	57 (90.5%)	7 (10.3%)	61 (89.7%)	1.3 (0.7 to 2.2)
Dissatisfied	0 (0%)	9 (100%)	2 (10.5%)	17 (89.5%)	0.8 (0.2 to 3.3)

GHQ, general health questionnaire.

*Adjusted for age, sex, occupational group, body mass index and physical activity.