10.1371/journal.pone.0200557.g001 Jeongeun Hwang Jeongeun Hwang Miso Jang Miso Jang Namkug Kim Namkug Kim Seunghyun Choi Seunghyun Choi Yeon-Mok Oh Yeon-Mok Oh Joon Beom Seo Joon Beom Seo Geographic patterns throughout the continental United States are shown. Public Library of Science 2018 R 2 values county disease mortality rates altitude factor Multivariate regression analysis 48 United States counties COPD prevalence subgroup United States counties disease mortality correlation disease mortality rate 2018-07-11 17:50:55 Figure https://plos.figshare.com/articles/figure/Geographic_patterns_throughout_the_continental_United_States_are_shown_/6806855 <p>The patterns for altitude (a) and chronic lower respiratory disease mortality rate (b). Counties with <20 deaths for a specific mortality code and those that lacked one or more census data were excluded from the analysis and are indicated in gray.</p>