A quit-vaping review’s publication date is not its evidence cutoff

Keep three dates separate

Note when the review was published, when its relevant searches were run, and the publication date of any later study you are comparing. These dates answer different questions. A review can appear recently while its main search occurred earlier.

Cochrane’s search guidance discusses rerunning searches and distinguishes fully incorporated studies from records awaiting classification or ongoing studies. Use that distinction to read the actual review’s coverage. Do not impose a universal expiry date on all research summaries or assume that a recent copyright year represents a new search.

Cochrane: Cochrane Handbook, Chapter 4: Searching for and selecting studies

Find the coverage statement in the methods

Look for the search description, supplementary methods, or update note. Different sources may have been searched on different dates. Record the relevant statement accurately rather than selecting the newest date anywhere in the file.

Our editorial worksheet uses four fields: “Question the review asked,” “Search date or dates,” “Later-search handling,” and “Coverage not established.” The last field is useful when you cannot find a date or the update process remains unclear. An unknown cutoff should remain unknown; a web page’s last-modified timestamp does not answer the methods question.

Check whether a later study belongs to the question

A paper published after the search may concern a different age group, product, intervention, or outcome. Recency does not make it eligible for every review. Compare the review’s stated question with the later report before deciding that the summary needs a different conclusion.

In a hypothetical reading exercise, someone finds a recent pilot paper after a review’s cutoff. The reading note identifies it as a later report to investigate, without claiming that it overturns the review. Its design and question still need checking. No real review or vaping program is rated by this example.

Cochrane: Cochrane Handbook, Chapter 3: Defining inclusion criteria

Explain the coverage limit when sharing the summary

A useful description can say that the review searched through its reported date and that a later report has not yet been assessed in your note. Keep the later link separate from the review’s own conclusions. Do not present your quick comparison as an updated systematic review.

This date check does not determine clinical effectiveness, guarantee that a search found every relevant study, or replace expert synthesis. It helps prevent a publication year from doing work it cannot do. The practical result is a clear coverage note and a named unresolved source, rather than a claim that the review contains everything currently known.