Finding F-1405

“Furthermore, the use of the HEPA filter reduced bacteria by 113.13 (95% CI: -197.89, -28.38) CFU/m3 and fungi by 6.53 (95% CI: -10.50, -2.55) CFU/m3.”

Dai et al. A systematic review and meta-analysis of indoor bioaerosols in hospitals: The influence of heating, ventilation, and air conditioning (2021). PloS one. Page 1. CKB 8400

Structure

Factor: Airborne bacteria
Intervention: Air filtration and air purifiers
Setting: hospital room
Study design: systematic review and meta-analysis of indoor bioaerosols in hospital rooms: culturable bacteria and fungi compared between rooms without a heating, ventilation and air conditioning system, rooms with a conventional system and rooms with an enhanced system, pooled with random-effects models and assessed with the Agency for Healthcare Research and Quality checklist (class 2)
Effect: difference 113.13 (-197.89–-28.38)
Caveat: a pooled estimate of the review; the difference is printed as negative and the estimate is recorded as its size with the direction in its own field

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.