The effects of PM 2.5 and PM 10 concentrations on the risk of CHD hospitalization showed a “U” shaped trend, whereas the effects of SO 2 and NO 2 on CHD in females showed a decreasing trend, and the effect of O 3 showed an inverted “U” shaped trend ( Figures 5 , 6 ).
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Association between meteorological factors, air pollutants and daily hospitalizations of coronary heart disease in rural areas of southern Xinjiang, China.
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