Association of Malnutrition-Inflammation Score with Quality of Life and Mortality in Maintenance Hemodialysis Patients: a 5-Year Prospective Cohort Study
Abstract
Background The Malnutrition-Inflammation Score (MIS), a non-expensive and easy-to-assess score between 0 and 30 to examine protein-energy wasting (PEW) and inflammation, includes 7 components of the subjective global assessment, body mass index, and serum albumin and transferrin concentrations. We hypothesized that the MIS risk-stratification of chronic hemodialysis (HD) patients in predicting outcomes is better than its components or laboratory markers of inflammation. Study Design 5-year cohort study. Setting & Participants We examined 809 stable HD outpatients and followed them for up to 5 years (10/2001–12/2006). Predictors MIS and other nutritional and inflammatory markers. Outcomes & Measurements Prospective all-cause mortality, health-related quality of life via SF-36, and tests of body composition. Results The MIS was correlated with serum interleukin-6 (IL-6) (r=+0.26, p<0.001), C-reactive protein (CRP) (r=+0.16, p<0.001) and several measures of nutritional status. Patients with higher MIS had lower SF-36 scores. After multivariate adjustment for case-mix and other measures of PEW, the chronic HD patients in the second (3–4), third (5–7) and fourth (≥8) quartiles of MIS had worse survival rates than those in the first (0–2) quartile (p<0.001). Each 2 unit increase in MIS was associated with two-fold higher death risk, i.e., adjusted death hazard ratio of 2.03 (95% CI: 1.76–2.33, p<0.001). Cubic spline survival models confirmed linear trends. The areas under the…
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Evidence Hub reads this as a cohort study, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence.
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