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Table 4 Dementia incidence according to hemodialysis duration

From: Is hemodialysis itself a risk factor for dementia? An analysis of nationwide registry data of patients on maintenance hemodialysis in Japan

Hemodialysis duration (year)

Non-diabetic patients

Diabetic patients

Number of patients

Person-years

Number of patients who developed dementia

Incidence rates of dementia (cases/1000 person-year)

Number of patients

Person-years

Number of patients who developed dementia

Incidence rates of dementia (cases/1000 person-year)

  

(95% CI)

   

(95% CI)

 

01

14,787

14,452.5

669

46.3

(

42.9

49.9

)

12,756

12,500.0

512

35.8

(

32.9

39.1

)

24

17,293

16,952.5

681

40.2

(

37.3

43.3

)

13,342

13,053.0

578

39.1

(

36.1

42.4

)

59

19,984

19,684.5

599

30.4

(

28.1

33.0

)

10,273

10,085.5

375

32.2

(

29.1

35.6

)

1014

12,479

12,336.5

285

23.1

(

20.6

25.9

)

2785

2736.5

97

30.1

(

24.7

36.8

)

1519

7452

7398.0

108

14.6

(

12.1

17.6

)

605

593.0

24

34.5

(

23.1

51.4

)

2024

4138

4109.0

58

14.1

(

10.9

18.3

)

98

96.0

4

34.9

(

13.1

93.1

)

25

4074

4054.5

39

9.6

(

7.0

13.2

)

35

34.0

2

50.6

(

12.7

202.5

)

Total

80,207

78,987.5

2439

30.9

(

29.7

32.1

)

39,894

39,098.0

1592

35.5

(

33.8

37.3

)

  1. Incidence rate of dementia (cases/1000 person-years) = the number of patients with newly developed dementia during the observation period (cases)/the total person-years of the target patients during the observation period (person-years) × 1000. The length of follow-up for patients with dementia was assumed to be 0.5 years
  2. CI confidence interval