Table 3. Follow-up duration, dementia events, and crude incidence rate of dementia among hemodialysis groups and peritoneal dialysis groups.

Clinical outcome	Hemodialysis (n = 52,332)	Peritoneal dialysis (n = 3292)
Total follow-up person-years	212,641	12,405
Numbers of dementia cases	3775	181
Mean follow-up time ± SD (years)	4.07 ± 3.10	3.79 ± 3.06
Median follow-up time (IQR) (years)	3.00 (1.00–7.00)	3.00 (1.00–7.00)
Incidence rate per 1,000 person-years (95% CI)	17.75 (17.19–18.33)	14.59 (12.54–16.88)

Footnote: CI, confidence interval.