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Life Expectancy: North Carolina 1990-1992 and 2010-2012, State and County
Life Expectancy (LE) is the average number of additional years that someone at a given age would be expected to live if he/she were to experience throughout life the age-specific death rates observed in a specified reference period (in this case, 1990-1992 or 2010-2012). Of course, death rates in the future are unknown and can be affected (positively or negatively) by new medical knowledge and procedures, better health conditions and practices, disease epidemics, and natural or man-made disasters (which would change the calculated LEs).
LEs are commonly presented in either Complete Life Tables (for individual years of age) or in Abridged Life Tables (for selected age intervals). The following Abridged Life Tables provide LEs for nineteen age intervals from infancy (<1) to ages 85+. In the Abridged Life Tables, LEs are calculated at the initial age for each age interval: at birth for ‘< 1 year’, 1 year old for ‘1 to 4’, etc. The LE estimates are calculated using NCHS Bridged population estimates and Vital Records death counts by reference year (1990-1992 or 2010-2012) by age interval by gender and/or race for the State of North Carolina and by county of residence. LEs are computed (using a procedure developed by Chiang1) for a specific reference year in a series of steps:
At the state level, the LEs are provided for each age interval (1) in total, and by (2) gender, (3) race (white and African American), and (4) race by gender. At the county level, the LEs are provided for each age interval (1) in total, and by (2) gender and (3) by race (white and African American). In counties with (1) a total African American population estimate of less than 1,000 or (2) any age interval African American population estimate less than 10, the LEs for African Americans are suppressed (labeled N/A) due to potential instability. Race-specific county-level LEs are limited to white and African American due to issues with small numbers for other racial and ethnic categories, such as American Indians and Hispanics. Previous studies have shown that American Indian race is under-reported on death certificates by as much as 20%,2so the LEs are not shown here for American Indians. For each LE, a 95 percent Confidence Interval is provided.
Improving life expectancy at birth was selected as a Key Cross-Cutting Performance Indicator for Healthy North Carolina 2020. Specifically, the goal is to: Increase North Carolina’s Life Expectancy to 79.5 years by 2020.
For questions or comments, contact Don Akin, State Center for Health Statistics, at (919) 715-4471 or firstname.lastname@example.org
1Chiang CL (1984) Life Table and Mortality Analysis, Malabar (FL), Robert E. Krieger Publishing Co.
1990-1992 Life Expectancies Reports:
2010-2012 Life Expectancies Reports:
Page Last Updated February 05, 2014