It's unfortunate that this blog post does not cite another study, the results of which were published a month prior to the post's publication, which investigate

It's unfortunate that this blog post does not cite another study, the results of which were published a month prior to the post's publication, which investigates in detail this issue: The Association Between Income and Life Expectancy in the United States, 2001–2014 [1]. That study actually offers insight into which particular factors correlate weakly or strongly with other factors, and offers charts and figures in key places to illustrate more detail than a mere line that mentions "socioeconomic factors, including race, education, and income, and access to health care". It's not a long read at all, and highly recommended. [1] doi:10.1001/jama.2016.4226 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4866586/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4866586/