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Table 2 Descriptive statistics of long-term PM10 and PM2.5 concentrations (μg/m3) of 196,167 subjects of the National Health Insurance Service-National Sample Cohort 2.0 in South Korea for 2007–2015 by four exposure periods

From: Incident cardiovascular disease and particulate matter air pollution in South Korea using a population-based and nationwide cohort of 0.2 million adults

Pollutants Exposure period Mean ± SD Interquartile range Range
PM10 Previous 1 year 50.5 ± 6.8 9.2 33.6–76.0
Previous 3 years 51.2 ± 6.4 10.1 33.8–74.2
Previous 5 years 52.3 ± 6.2 9.7 36.6–74.2
5 years before baselinea 55.7 ± 6.6 11.4 38.4–71.4
PM2.5 Previous 1 year 26.4 ± 3.1 4.2 18.0–38.1
Previous 3 years 27.5 ± 3.9 5.1 18.8–40.8
Previous 5 years 28.1 ± 3.6 5.5 19.0–39.8
5 years before baselinea 31.2 ± 3.4 4.5 21.2–39.8
  1. Abbreviations: PM10 particulate matter 10 μm or less in diameter. PM2.5 particulate matter 2.5 μm or less in diameter. SD standard deviation
  2. a5 years before baseline, 5-year average PM concentration for 2002–2006 before the baseline in 2007