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Table 1 Percent change (95 % CI) in risk of emergency room visits for myocardial infarction associated with Lag-0 PM2.5 across strata of glutathione-related oxidative potential (OPGSH) and combined redox-weighted oxidant capacity of NO2 and O3 (Ox wt)

From: Ambient PM2.5 and risk of emergency room visits for myocardial infarction: impact of regional PM2.5 oxidative potential: a case-crossover study

Percentile of 3-day mean Ox wt Percentile of Regional OPGSH
≤50th >50th >75th >90th
≤50th −2.0 (−5.0, 1.0) 0.57 (−4.0, 5.0) 2.9 (−1.2, 7.2) 6.0 (0.0, 13)
>50th 1.5 (−0.6, 3.6) 5.5 (3.0, 8.0) 6.4 (2.0, 11) 10 (7.5, 13)
>75th 1.5 (−1.3, 4.4) 5.7 (2.5, 9.1) 6.7 (1.8, 12) 13 (6.8, 19)
>90th 1.4 (−4.6, 7.8) 9.0 (3.5, 15) 9.2 (0.46, 19) 29 (26, 33)
  1. Risk estimates reflect a 5 μg/m3 change in PM2.5. All models are adjusted for 3-day mean ambient temperature and relative humidity (cubic splines)