Effect of HEPA filtration air purifiers on cognitive function from a secondary outcome analysis of a pragmatic randomized crossover trial.

Sci Rep · 2026 · PMC13246935 · PMID 41991562

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did not reach statistical significanceno p-value reported

For Trail Making Test – Part B, the overall reduction in mean completion times between HEPA and sham filtration did not reach statistical significance but was significantly moderated by age (test for interaction p = 0.02, Fig. 3 ).

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