| Methods |
RMS |
| Participants |
Canada, Quebec, Quebec health insurance programme (RAMQ) |
| Interventions |
Ceiling + Co‐insurance |
| Outcomes |
Medicine use |
| Notes |
Supported by the Ministry of Health in Quebec and the Règie de l'assurance maladie du Québec, Ministere de la Santé et des Services Sociaux, the Medical Research Council, the National Research Development Program |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Random sequence generation (selection bias) |
Unclear risk |
Not applicable (RMS) |
| Allocation concealment (selection bias) |
Unclear risk |
Not applicable (RMS) |
| Baseline outcome measurement similarity |
Unclear risk |
Not applicable (RMS) |
| Baseline characteristics similarity |
Unclear risk |
Not applicable (RMS) |
| Protection against contamination |
Unclear risk |
Not applicable (RMS) |
| Intervention independent of other changes |
Low risk |
Intervention is independent of other relevant changes |
| Shape of the intervention effect pre‐specified |
Low risk |
Point analysis is the point of intervention |
| Intervention unlikely to affect data collection |
Low risk |
Sources and methods were the same before and after the intervention |
| Incomplete outcome data (attrition bias)
All outcomes |
Low risk |
No outcome data are missing |
| Blinding of outcome assessment (detection bias)
All outcomes |
Low risk |
Outcomes are objective |
| Selective reporting (reporting bias) |
Low risk |
All relevant outcomes in the Methods section are reported in the Results section |
| Other bias |
Low risk |
No other important bias is detected in the study |
