Life Expectancy and Years of Potential Life Lost: Useful Outcome Measures in Cardiovascular Medicine?

Years of Potential Life Lost Because of Cardiovascular Disease in Asian-American Subgroups, 2003-2012

Background

Asian‐American subgroups (Asian‐Indian, Chinese, Filipino, Korean, Japanese, and Vietnamese) display varied cardiovascular disease mortality patterns, especially at younger ages. This study aims to examine the years of potential life lost because of ischemic heart disease and cerebrovascular disease among the 6 largest Asian‐American subgroups compared with non‐Hispanic whites.

Methods and Results

We used National Center for Health Statistics Multiple Causes of Death mortality files from 2003 to 2012 to calculate race‐specific life expectancy, mean years of potential life lost, and years of potential life lost per 100 000 population for each Asian subgroup and non‐Hispanic whites. Asian‐American subgroups display heterogeneity in cardiovascular disease burden. Asian‐Indians had a high burden of ischemic heart disease; Asian‐Indian men lost 724 years per 100 000 population in 2012 and a mean of 17 years to ischemic heart disease. Respectively, Vietnamese and Filipino men and women lost a mean of 17 and 16 years of life to cerebrovascular disease; Filipino men lost 352 years per 100 000 population in 2012. All Asian subgroups for both sexes had higher years of life lost to cerebrovascular disease compared with non‐Hispanic whites.

Conclusions

Cardiovascular disease burden varies among Asian subgroups, and contributes to greater premature mortality in certain subgroups. Asian‐Indian and Filipino populations have the highest years of life lost because of ischemic heart disease and Filipino and Vietnamese have the highest years of life lost because of cerebrovascular disease. Analysis of risk factors and development of subgroup‐specific interventions are required to address these health disparities.

Years of Potential Life Lost from Cardiovascular Disease Among Hispanics

Objective

To quantify the impact of cardiovascular disease and its subtypes on the premature mortality of Hispanics in the United States.

Methods

We used national death records to identify deaths for the three largest Hispanic subgroups (Mexicans, Puerto Ricans, and Cubans) in the United States from 2003 to 2012 (N = 832,550). We identified all deaths from cardiovascular disease and by subtype (ie, ischemic, cerebrovascular, hypertensive and heart failure) using the underlying cause of death via ICD-10 codes. Years of potential life lost (YPLL) was calculated by age categories standardizing with the 2000 US Census population. Population estimates were calculated using linear interpolation from 2000 and 2010 US Census data.

Results

After standardization, Puerto Ricans experienced the highest YPLL for all types of cardiovascular disease compared with Mexicans and Cubans (1,139 years per 100,000 compared with 868 and 841, respectively), a disparity that remained consistent over the course of a decade. Among different subcategories of cardiovascular disease, Puerto Ricans had the highest YPLL for ischemic and hypertensive heart disease, while Mexicans had the highest YPLL from cerebrovascular disease.

Conclusions

In conclusion, disaggregation of Hispanic subgroups revealed marked heterogeneity in premature cardiovascular mortality. These findings suggest that measures to improve the cardiovascular health of Hispanics should incorporate subgroup status as a key part of public health strategy.

Premature mortality due to nephrotic syndrome and the trend in nephrotic syndrome mortality in Japan, 1995-2014

BACKGROUND

This study analysed the trend in mortality from nephrotic syndrome in Japan from 1995 to 2013. Moreover, to better understand premature death from nephrotic syndrome, the average years of life lost due to nephrotic syndrome were estimated.

METHODS

National death certificate data were evaluated. Age-standardised mortality rates from nephrotic syndrome were calculated by direct standardisation using the World Standard Population. Trends for average annual changes in percentages were determined by joinpoint regression analysis. Average years of life lost were estimated by dividing total years of life lost by the number of deaths from nephrotic syndrome. Years of life lost were estimated by the constant end-point method, with 65 years as the endpoint. Average years of life lost due to malignant neoplasms, the leading cause of death in Japan, were estimated for comparison.

RESULTS

There were 9945 deaths (4872 men and 5073 women) during the study period. The numbers of deaths and crude overall mortality rates increased, while age-standardised mortality rates continuously decreased, for both sexes. The annual percentage changes were -1.9% [95% confidence interval (CI), -2.3 to -1.4%] for men and -3.5% (95% CI -4.1 to -2.9%) for women. The average years of life lost due to nephrotic syndrome decreased during the study period, but were greater than for patients who died of malignant neoplasm.

CONCLUSIONS

Mortality and premature mortality rates from nephrotic syndrome significantly decreased in Japan between 1995 and 2014. Despite these improvements, nephrotic syndrome patients ≤65 years of age still have a poor prognosis.