Association between phthalate exposure and lower lung function in an urban elderly population: A repeated-measures longitudinal study
2018
Kim, Kyoung-Nam | Lee, Mee-Ri | Choi, Yoon-Hyeong | Lee, Bo-Eun | Hong, Yun-Chul
Lung function is a major predictor of morbidity and mortality. Only a few studies have explored the association between phthalate exposure and lung function.To evaluate the association between phthalate exposure and lung function in the elderly.A total of 3 repeated-measures surveys were conducted in 559 elderly individuals aged ≥60 years in Seoul, Korea, at 1-year intervals (2012–2015). During each survey, urinary mono-(2-ethyl-5-hydrohexyl) phthalate (MEHHP) (geometric mean, 15.68 μg/L), mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP) (11.97 μg/L), and mono-n-butyl phthalate (MnBP) (2.09 μg/L) levels were measured; moreover, lung function tests and a structured questionnaire interview were performed. We constructed linear mixed models to assess the association between urinary phthalate metabolite levels and lung function.A doubling of creatinine-adjusted urinary phthalate metabolite levels was inversely associated with forced expiratory volume in 1 s (L) (β = −0.01, 95% confidence interval [CI]: −0.02, 0.004 for MEHHP; β = −0.02, 95% CI: −0.03, −0.01 for MEOHP; β = −0.01, 95% CI: −0.03, −0.003 for MnBP) and forced vital capacity (L) (β = −0.02, 95% CI: −0.03, −0.001 for MEHHP; β = −0.02, 95% CI: −0.03, −0.004 for MEOHP; β = −0.02, 95% CI: −0.03, −0.001 for MnBP). A doubling of creatinine-adjusted MnBP levels was associated with increased rates of annual decline in forced vital capacity (L/year) (β = −0.01, 95% CI: −0.02, −0.001).Urinary phthalate metabolite levels were associated with lower lung function and an increased rate of decline in lung function in an elderly population.
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