Macrocytic anemia, kidney dysfunction, and mortality in general population: Japan specific health checkup study

Area of Science:

• Internal Medicine
• Nephrology
• Geriatrics

Background:

• Anemia and chronic kidney disease (CKD) are interconnected conditions that independently and synergistically increase mortality risk, especially in older adults.
• The specific relationship between anemia types, CKD progression, and mortality outcomes in the general population remains incompletely understood.

Purpose of the Study:

• To investigate the association between different types of anemia and chronic kidney disease (CKD).
• To evaluate the impact of anemia type and CKD on all-cause, cancer-related, cardiovascular, and infectious disease mortality.
• To determine if anemia type improves mortality prediction in individuals with CKD.

Main Methods:

• Utilized a nationwide database of 203,280 participants from the "Specific Health Check and Guidance in Japan" evaluation (2008-2011).
• Employed multivariate Cox proportional hazards regression analysis over a 4-year follow-up period.
• Categorized participants based on anemia type (normocytic, macrocytic) and CKD stage.

Main Results:

• Macrocytic anemia prevalence increased with advancing CKD stage.
• Macrocytic anemia was significantly associated with increased all-cause, cancer, and cardiovascular mortality.
• The inclusion of anemia type enhanced the predictive accuracy for all-cause mortality.
• Macrocytic anemia in the context of CKD demonstrated the highest hazard ratio for all-cause mortality.

Conclusions:

• A strong correlation exists between macrocytic anemia and chronic kidney disease (CKD).
• Macrocytic anemia serves as a significant predictor of mortality in the general population.
• Macrocytic anemia, especially with CKD, may function as an early indicator of premature death in at-risk individuals.