Comparison of mild physiological effects of surgical masks and N95 respirators over 60 min at rest.

Dead-space-associated rebreathing of expired air and heat trapping with use of surgical masks and N95 respirators may underlie anecdotal reports of adverse symptoms associated with medical face barriers. Limited data exist directly comparing the physiological effects of masks and respirators at rest. We assessed the short-term physiological effects of both barrier types over 60 min at rest, including face microclimate temperature, end-tidal gases, and venous blood acid-base variables.

Environmental Correlates of Reaching a Centenarian Age: Analysis of 144,665 Deaths in Washington State for 2011-2015.

This study examined the association of several social and environmental factors on the likelihood of reaching centenarian age for older adults in Washington State. A survival analysis of reaching centenarian age for older adults aged 75 years and above was performed using Washington State mortality data from 2011-2015. Models were adjusted for sex, race, education, marital status, and neighborhood level social and environmental variables at the block group level.