Finding · as stated by the study, recorded by Coridum · status verified-machine

Finding F-0237

“However, no significant improvements were observed for forced expiratory volume in one second (FEV1) (SMD = 0.04; 95% CI: −0.07 to 0.15), peak expiratory flow (PEF), forced vital capacity (FVC), respiratory symptoms, or blood pressure.”

Effectiveness of Personal‑Level Protective Measures Against Air Pollution on Respiratory Health: A Systematic Review and Meta‑Analysis of Randomized Controlled Trials (2026). Indian J Occup Environ Med. Page 1. CKB 1574

Structure

Factor
Particulate matter (PM₂.₅ and PM₁₀)
Outcome
Lung function
Intervention
Air filtration and air purifiers
Study design
systematic review and meta-analysis of 27 randomised controlled trials of personal-level protective measures against air pollution (air purifiers, respirators and similar), GRADE-assessed (class 2)
Effect
SMD 0.04 (-0.07–0.15)
Sample
27 studies
Flags
ci-includes-1
Caveat
the same sentence reports no significant improvement in peak expiratory flow, forced vital capacity, respiratory symptoms or blood pressure (no numbers given for those)

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.