Abstract
End-stage renal disease is a serious public health issue. The objective of this retrospective cohort study was to assess the association between hemodialysis and cognitive impairment, while controlling for age, sex, residence, and comorbidities. This study assesses the risk of cognitive impairment among a nationwide cohort of new hemodialysis patients derived from the NHIRD. A total of 4330 patients were assigned to the dialysis group and 17 320 patients were assigned to the control group. A total of 2103 of the patients developed cognitive impairment within 2 years after the date of dialysis initiation. Patients who developed cognitive impairment were older (69.85 ± 11.56) than their counterparts who did not develop cognitive impairment (58.58 ± 14.77; P < .001). The log-rank test of Kaplan-Meier analysis revealed a higher risk of cognitive impairment in the hemodialysis group than in the non-hemodialysis group (P < .001). The interval between dialysis initiation and the onset of cognitive impairment was 98.66 ± 46.39 months among non-dialysis subjects and 53.45 ± 41.90 months among dialysis subjects, and the between-group difference was significant (P < .001). The Cox Proportional Hazard Model revealed that after controlling for gender, age, residence, and comorbidities, hemodialysis was shown to have a significant impact on cognitive impairment (Hazard Ratio [HR]: 1.44; 95% confidence interval [CI]: 1.29-1.60). Furthermore, the risk of developing cognitive impairment increased with age (HR: 1.07; 95% CI: 1.06-1.08). Hemodialysis was associated with cognitive impairment. There was a significant association between age and cognitive impairment, regardless of the comorbidities prior to hemodialysis. There was no evidence of an association between comorbidities and cognitive impairment after beginning hemodialysis.
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