Finding F-0305

“In the case of HCHO, the difference between the means was ∆M = 0.191, with a 95% confidence interval (0.184, 0.198), t value = 53.49, and p < 0.0001.”

Ilieș et al. The Home-Based Rehabilitation of Patients Through Physical Exercises in the Context of Indoor Air Quality (2025). Healthcare (Basel). Page 11. CKB 1369

Structure

Factor: Formaldehyde (CH₂O)
Intervention: Air purifiers
Setting: home, RO (18 weeks)
Study design: 18-week monitoring of 11 indoor air quality parameters with low-cost equipment in a home room used for rehabilitation exercises in Oradea (Romania), with and without an air purifier (class 4)
Effect: difference 0.191 (0.184–0.198)
Caveat: measured with low-cost equipment; formaldehyde readings of 0.2 to 0.6 mg/m3 are far above typical indoor levels and rest on that equipment

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.