Finding F-0991

“Bipollutant models involving CO and PM2.5 also revealed that an interquartile range (IQR) increase in CO concentrations (2.26 ppm) was associated with higher hemoglobin levels [β = 0.04; 95 % confidence interval (CI): 0.01, 0.07], and a lower odds of anemia prevalence [odds ratios (OR) = 0.90; 95 % CI: 0.83, 0.98].”

Deng Association of household air pollution exposure and anemia among pregnant women: Analysis of baseline data from ’Household Air Pollution Intervention Network (HAPIN)’ trial (2024). Environment international. Page 1. CKB 5965

Structure

Factor: Carbon monoxide (CO)
Population: pregnant women
Setting: personal exposure of the pregnant woman
Study design: analysis of baseline data from the HAPIN randomised trial in Guatemala, India, Peru and Rwanda: 24-hour personal PM2.5, black carbon and carbon monoxide of 3,163 pregnant women at 15 weeks of gestation against haemoglobin and anaemia prevalence, in single-pollutant and bipollutant regression models adjusted for confounders (class 4)
Effect: beta 0.04 (0.01–0.07) per one interquartile range of personal carbon monoxide, 2.26 ppm g/dL
Sample: 3163 participants
Caveat: PM2.5 ran the other way, towards lower haemoglobin, but not significantly; the unit of the coefficient is the haemoglobin unit of the study

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