descriptive
Strong Support
Researchers found that people just above and just below the age cutoff for getting the shingles vaccine were pretty similar in their health before getting the shot—so any differences in outcomes later are likely due to the vaccine, not pre-existing differences.
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Evidence from Studies
Supporting (1)
67
Community contributions welcome
67
The study checked if people just before and just after the vaccine eligibility age were similar in health before getting the vaccine—and they were. This means the comparison is fair, so the results can be trusted.
Contradicting (0)
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Community contributions welcome
No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.