大気汚染と糖尿病・高血圧

ロスの黒人女性を10年観察して居住地と高血圧、糖尿病の関係を大気汚染の程度で説明しようとした。
Air Pollution and Incidence of Hypertension and Diabetes Mellitus in Black Women Living in Los Angeles
Patricia F. Coogan, ScD; Laura F. White, PhD; Michael Jerrett, PhD; Robert D. Brook, M Circulation. 2012; 125: 767-772
Assessment of incidence rate ratios (IRRs) for incident hypertension and diabetes mellitus associated with exposure to fine particulate matter (PM2.5) and nitrogen oxides in a cohort of black women living in Los Angeles. Over follow-up from 1995 to 2005, 531 incident cases of hypertension and 183 incident cases of diabetes mellitus occurred. When pollutants were analyzed separately, the IRR for hypertension for a 10-μg/m3 increase in PM2.5 was 1.48 (95% CI, 0.95–2.31), and the IRR for the interquartile range (12.4 parts per billion) of nitrogen oxides was 1.14 (95% CI, 1.03–1.25). The corresponding IRRs for diabetes mellitus were 1.63 (95% CI, 0.78–3.44) and 1.25 (95% CI, 1.07–1.46).
ディーゼルの粒子より窒素酸化物の方が害が確からしいのか？IRRは粒子の方が高いが95%CIが幅広い。