Finding F-1511

“Personal‐level interventions significantly reduced indoor PM2.5 (SMD = −2.27; 95% CI: −2.98 to −1.55) and PM10 (SMD = −3.87; 95% CI: −4.59 to −3.16) levels.”

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)
Intervention: Air filtration and air purifiers
Setting: home
Study design: systematic review and meta-analysis of 27 randomised controlled trials of personal-level protective measures against household air pollution: indoor particulate matter and lung function pooled as standardised mean differences with GRADE certainty (class 2)
Effect: SMD 2.27 (-2.98–-1.55)
Caveat: a standardised mean difference pooled across trials, printed as negative, with the estimate recorded as its size and the direction in its own field; the same review finds no improvement in lung function

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.