Serum anion gap is predictive of mortality in an elderly population

Shin Young Ahn, Jiwon Ryu, Seon Ha Baek, Ji Won Han, Jang Han Lee, Soyeon Ahn, Kwang Il Kim, Ho Jun Chin, Ki Young Na, Dong Wan Chae, Ki Woong Kim, Sejoong Kim

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)


    An elevated serum anion gap is known to be associated with hypertension, low cardiorespiratory fitness, and decreased renal function. We evaluated whether serum AG might be predictive of elderly mortality in a community-based cohort in Korea. We analyzed the available data from 862 elderly people in the Korean Longitudinal Study on Health and Aging. Over a 5-year observational period, 151/862 (17.5%) participants died, and a high albumin-adjusted anion gap (SAAG) was associated with an increased risk of all-cause mortality in unadjusted analyses (hazard ratio [HR], 1.96; 95% confidence interval [CI], 1.41-2.71) and fully adjusted analyses (HR, 1.77; 95% CI, 1.24-2.52), compared with a low SAAG group. The population attributable fraction of death due to high SAAG was 38.2% (95% CI 20.7-58.2%). In particular, the participants with high SAAG had higher cardiovascular and infection-related mortality rates than those with low SAAG (HR, 2.11; 95% CI, 1.06-4.19, and HR, 9.69; 95% CI, 1.12-83.4, respectively). High SAAG may be an independent predictor of mortality and is associated with higher cardiovascular and infection related mortality in the elderly.

    Original languageEnglish
    Pages (from-to)122-127
    Number of pages6
    JournalExperimental Gerontology
    Issue number1
    Publication statusPublished - 2014 Feb


    • Age
    • Albumin
    • Anion gap
    • Elderly
    • Mortality

    ASJC Scopus subject areas

    • Biochemistry
    • Ageing
    • Molecular Biology
    • Genetics
    • Endocrinology
    • Cell Biology


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