Quality indicators | Points |
---|---|
Reporting | Â |
Is hypothesis/objectives/aim clearly described (1) | Â |
Are the main outcomes to be measured clearly described in the introduction/methods (1) | Â |
Are the characteristics of the study/population clearly described (1) | Â |
Is the distribution of confounders among study groups clearly described and did the study adjust for those confounders (1) | Â |
Are the main findings described (1) | Â |
Have characteristics of patients lost to follow-up/did not complete the study been described (1) | Â |
External validity | Â |
Are study participants representative of entire population from which they were recruited (1) | Â |
Are study participants representative of current OHCA population (1) | Â |
Were those participants who were prepared to participate representative of the entire population from which they were recruited (1) | Â |
Internal validity | Â |
Was an attempt made to blind those measuring main outcomes of the study (1) | Â |
Did the study adjust for different lengths of follow-up of participants (1) | Â |
Were statistical tests used appropriate (1) | Â |
Was the outcome measure accurate (1) | Â |
Were the participants in the different groups recruited from the same populations (1) | Â |
Were study participants in the different groups recruited over the same time period (1) | Â |
Was there adequate adjustment of confounding in the analyses (1) | Â |
Study design | Â |
Cross sectional (0.5) | Â |
Cohort prospective (2) | Â |
Cohort retrospective (1) | Â |
Control group (yes = 1 point, no = 0 points) |  |
Secondary/retrospective analysis (1) | Â |
Sample size adequate/power analysis (yes = 1, no = 0) |  |
Total max points for study design (4 points) | Â |
Total points (20) | Â |