Research Article
The Efficacy of Percutaneous Patent Foramen Ovale Closure on Migraine: a Meta-Analysis of Randomized Controlled Trials and Observational Studies
Table 1
NOS score of included case-control studies.
| | Score category | Score | Anzola | Vigna |
| | Selection | | Is the case definition adequate | 1 | 1 | 1 | | Representativeness of the cases | 1 | 1 | 1 | | Selection of controls | 1 | 1 | 1 | | Definition of controls | 1 | 1 | 1 | | Comparability | | Comparability of cases and controls on the basis of the design or analysis | 2 | 1 | 1 | | Exposure | | Ascertainment of exposure | 1 | 1 | 1 | | Same method of ascertainment for cases and controls | 1 | 1 | 0 | | Nonresponse rate | 1 | 1 | 1 | | Total score | | 8 | 7 |
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