Long-term nitrogen dioxide exposure and cause-specific mortality in the U.S. Medicare population.

ABSTRACT:

Background

Since 1971, the annual National Ambient Air Quality Standard (NAAQS) for nitrogen dioxide (NO₂) has remained at 53 ppb, the impact of long-term NO₂ exposure on mortality is poorly understood.

Objectives

We examined associations between long-term NO₂ exposure (12-month moving average of NO₂) below the annual NAAQS and cause-specific mortality among the older adults in the U.S.

Methods

Cox proportional-hazard models were used to estimate Hazard Ratio (HR) for cause-specific mortality associated with long-term NO₂ exposures among about 50 million Medicare beneficiaries living within the conterminous U.S. from 2001 to 2008.

Results

A 10 ppb increase in NO₂ was associated with increased mor

SUBMITTER: Eum KD 

PROVIDER: S-EPMC8810665 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature