Washington (AP) -- A report by the Harvard School of public health says Tennessee ranks 45th in life expectancy at 75.1 years.
McNairy and Dyer counties in West Tennessee shared the lowest life expectancy, at 73 years, for both men and women based on the most recent statistics from 1999.
The highest was Williamson County, south of Nashville, with a life expectancy of 78.8 years. The second highest was Cumberland County on the Cumberland Plateau at 76.9.
Among the state's four largest metropolitan areas, Knox County had the highest number at 76 years. Then came Hamilton County with 75.4, Davidson County with 74.8 and Shelby County with 73.2.