Introduction: Serum albumin (Alb) levels have been found to be independent predictors of all-cause mortality in a community-based population, but whether this is the case for serum cholinesterase (ChE) levels is uncertain. This study aimed to determine whether serum ChE levels are independent predictors of all-cause mortality in a community-based population. Methods: A total of 3,504 subjects (mean age 62.5 years) from Takahata, Japan participated and were followed up for 13.5 years (median 13.2 years). Based on baseline serum Alb and ChE levels, subjects were stratified by interquartile range as low, middle, and high. The correlation between serum Alb and ChE levels was examined by calculating correlation coefficients. The association between each group and all-cause mortality was examined by Kaplan-Meier and Cox proportional hazards analysis. Results: During follow-up, 568 subjects died. There was a positive correlation between serum Alb and ChE levels (r=0.30). Kaplan-Meier analysis showed that all-cause mortality in the low group was significantly higher for both serum Alb and ChE levels (log-rank P<0.01). Adjusted Cox proportional hazards analysis showed that the serum Alb level was not an independent predictor of all-cause mortality (hazard ratio (HR) 1.18, 95% confidence interval (CI) 0.95-1.46 for all-cause mortality in the low group compared to the middle group), whereas the serum ChE level was an independent predictor of all-cause mortality (HR 1.30, 95% CI 1.06-1.59 for all-cause mortality in the low group compared to the middle group). Conclusion: The serum ChE level is an independent predictor of all-cause mortality in the general community-based population.
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