Table 1.

A summary of the scientific evidence for variables with sufficient data to draw a conclusion on the association between work environment factors and future depressive symptoms

Work-related factor	Participants	Studies	Scientific evidence
Relationship between occupational environment and less depressive symptoms
Control	158 251	19
Relationship between occupational environment and more depressive symptoms
Demands - psychological job demands	53 985	10
Job strain	197 682	14
Passive job (low decision latitude, low job demands)	11 419	2
High pressure job	34 554	5
Effort reward imbalance	27 136	3
Low support at the work place	82 772	17
- Low supervisor support	50 935	8
- Low co-worker support	27 170	6
Poor social climate at the work place	9 242	2
Poor social capital at the work place	59 340	2
Low work place justice	33 589	5
- Procedural injustice	33 589	5
- Relational injustice	30 761	3
Work place conflicts	13 732	3
- Conflicts with superiors	9 692	2
- Conflicts with co-workers	9 692	2
Bullying	15 173	3
Low job development	15 173	4
Job insecurity	24 833	7
Long working week	13 107	6
The scientific evidence is in-sufficient () to determine if there is a relationship between the following occupational factors and depressive symptoms/
Demands (several types of demands), Demands (emotional), Distributive justice, Threats, Violence, Irregular, Irregular work hours, Physically demanding work, Pesticides, Solvents, Heavy metals

- There is scientific evidence for an association between exposure and outcome. The result is based on studies of high or moderate quality. The quality of evidence has been upgraded due to consistency of the data (control and job strain) or large magnitude of effect (bullying)

- There is scientific evidence for an association between exposure and outcome. The result is based on studies of high or moderate quality

- It is not possible to determine if there is any association between exposure and outcome. The motivation is that one or several conditions apply: 1) no study fulfilled the inclusion criteria, 2) none of the studies fulfilling the inclusion criteria were relevant to the hypothesis tested in the present review, 3) all relevant studies were of low quality or 4) studies were of high or moderate quality - but one or several limitations applied, e.g. inconsistency of data between studies