To the Editor We read with great interest the recent study published in JAMA Internal Medicine by Morishita and colleagues1 on the effects of portable air-filtration systems on systolic blood pressure (SBP) control in elderly participants. If effective, this would be a convenient and cost-effective means of controlling cardiovascular risk in urban communities. However, we would like to point out certain limitations in this study.
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Ramadoss V, Kotecha PT. Limitations in the Methodology Assessing Blood Pressure and the Need for Strict Exclusion Criteria. JAMA Intern Med. 2019;179(2):275. doi:10.1001/jamainternmed.2018.7495
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