| Methods |
Controlled before and after study, 12 months follow up |
| Participants |
Three years of data (1991 to 1993) from German, Sozio‐Oekonomisches Panel (SOEP), and the UK, from the British Household Panel Study (BHPS) |
| Interventions |
Fixed‐term contract (no permanent contract) |
| Outcomes |
General health: perceived health status on a 5‐point scale (from excellent to very poor). A single 5‐level self‐rated health status item has been shown to be a good predictor of long‐term survival (Benyamin 1999; Idler 1997) |
| Type of flexibility |
Employer dictated |
| Notes |
— |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Representative sample |
Low risk |
|
| Appropriate control |
Low risk |
|
| Adjustment for non‐response |
Low risk |
|
| Conclusions substantiated |
Low risk |
|
| Adequate adjustment for confounders |
Low risk |
|
| Protection against contamination |
Low risk |
|
| Appropriate statistics |
Low risk |
|
