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. Author manuscript; available in PMC: 2016 Jan 13.
Published in final edited form as: JAMA. 2015 Jan 13;313(2):147–155. doi: 10.1001/jama.2014.16969

Figure 5. Age-Adjusted Total Mortality Rates vs Household Income for 3 Time Periods: 1960–1969, 1970–1989, and 1990–2010.

Figure 5

Maine county age-adjusted mortality rates vs income over 3 time periods. Error bars indicate non–income-adjusted 95% confidence intervals. County death data were not available for 1960–1969 to calculate confidence intervals. Regression was performed on Maine county-level data excluding Franklin County. Franklin County external t test values: 1960–1969: 0.27 (P = .36); 1970–1989: 3.15 (P < .001); 1990–2010:2.28 (P = .005). The observed − expected mortality in Franklin County for each period: 1960–1969: 7.9 deaths/100 000 (95% CI, −22.0 to 37.9); 1970–1989: −60.4 deaths/100 000 (95% CI, −97.9 to −22.8); 1990–2010: −41.6 deaths/100 000 (95% CI, −77.3 to −5.8).