Finding F-0444

“After adjusting for effects of contact investigation and latent TB infection treatment, improving ventilation rate to levels with CO2 <1000 ppm was independently associated with a 97% decrease (95% CI: 50%-99.9%) in the incidence of TB among contacts.”

Effect of ventilation improvement during a tuberculosis outbreak in underventilated university buildings (2020). Indoor air. Page 1. CKB 7796

Structure

Factor: Carbon dioxide (CO₂)
Outcome: Tuberculosis
Intervention: Ventilation
Population: university students and staff (outbreak contacts)
Setting: university classroom, TW
Study design: outbreak investigation with a contact cohort: 27 tuberculosis cases and 1665 contacts in underventilated university buildings in Taiwan, indoor CO2 measured before and after ventilation engineering, incidence of TB among contacts analysed with adjustment for contact investigation and latent TB infection treatment (class 3)
Effect: other 97 (50–99.9)
Sample: 1665 participants
Caveat: printed as a percentage decrease with a percentage confidence interval; recorded as printed under measure other rather than converted to a ratio

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.