Type of study | ||||
Cost-effectiveness analysis (70%) | Cost-Utility Analysis (30%) | Â | Â | Â |
Type of journal | ||||
Statistics/Econometrics (7%) | Health Economics (19%) | Health Services (30%) | Medical (39%) | Working Paper (5%) |
Year of publication | ||||
1990 – 2000 (14%) | 2001 – 2010 (86%) |  |  |  |
Type of intervention | ||||
Surgical (37%) | Medical (33%) | Rehabilitation (5%) | Public Health Policy (14%) | Â |
Diagnostic (2%) | Preventative (9%) | Â | Â | Â |
Number of interventions | ||||
Two (74%) | Three or more (26%) | Â | Â | Â |
Sample size | ||||
100 – 1000 (33%) | 1001 – 5000 (29%) | 5001+ (33%) | Not reported (5%) |  |
Summary outcome | ||||
None (35%) | Incremental Cost-Effectiveness Ratio (51%) | Net Benefit (14%) | Â | Â |
Evaluation of uncertainty on summary outcome | ||||
Yes (43%) | No (6%) | Partial/Unclear (51%) | Â | Â |
Method addressing selection bias | ||||
Regression Analysis (28%) | Covariate Matching (7%) | Propensity Scores (49%) | Instrumental Variables (7%) | Difference-in-Differences (9%) |
Assessment of methods’ assumptions | ||||
Detailed (9%) | Partial or None (91%) | Â | Â | Â |
Comparison of analytical methods | ||||
Yes (23%) | No (77%) | Â | Â | Â |
Effort to contrast findings with other studies | ||||
Yes (47%) | No (53%) | Â | Â | Â |