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(A) Effect estimate for an absolute decrease in cardiovascular mortality rate for all counties (n=619) and by attainment status (n=619) counties—adjusted for confounders but not PM2.5 and corresponding 95% confidence intervals (B) Decrease in cardiovascular mortality rate effect estimate per unit decrease in PM2.5 for all counties, nonattainment counties, and attainment counties—adjusted for confounders and corresponding 95% confidence intervals.
