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Table 1 Baseline characteristics of 202,716 participants by eGFRcr-cys status

From: Kidney function, albuminuria, and their modification by genetic factors and risk of incident dementia in UK Biobank

 

eGFRcr-cys ml per min per 1.732

Characteristic

 < 60

N = 9,525

60–89

N = 129,095

 ≥ 90

N = 64,082

Age in years, mean (SD)

65.4 (2.8)

64.4 (2.9)

63.4 (2.7)

Women, N (%)

5,041 (52.9)

67,640 (52.4)

33,994 (53.1)

Ethnicity, N (%)

  White

9,085 (95.9)

124,852 (97.2)

61,980 (97.1)

  Non-white

387 (4.1)

3,626 (2.8)

1,835 (2.9)

Townsend deprivation index, quintiles, N (%)

 1 (least deprived)

1,470 (15.4)

25,386 (19.7)

13,736 (21.5)

 2

1,638 (17.2)

25,635 (19.9)

13,166 (20.6)

 3

1,778 (18.7)

25,778 (20.0)

12,938 (20.2)

 4

1,937 (20.3)

26,009 (20.2)

12,556 (19.6)

 5 (most deprived)

2,698 (28.3)

26,177 (20.3)

11,631 (18.2)

Education, N (%)

 Primary

3,690 (39.5)

36,356 (28.6)

14,247 (22.5)

 Secondary

3,422 (36.6)

55,577 (43.7)

30,297 (47.8)

 Post-secondary non-tertiary

909 (9.7)

13,733 (10.8)

7,137 (11.3)

 Tertiary

1,333 (14.3)

21,545 (16.9)

11,696 (18.5)

Household income in GBP, N (%)

  < 18,000

3,642 (49.3)

37,259 (35.8)

15,005 (28.4)

 18,000–30,999

2,288 (31.0)

34,104 (32.7)

17,276 (32.7)

 31,000–51,999

1,011 (13.7)

20,792 (20.0)

12,485 (23.6)

 52,000–100,000

382 (5.2)

9,780 (9.4)

6,450 (12.2)

  > 100,000

63 (0.9)

2,244 (2.2)

1,631 (3.1)

Country, N (%)

 England

8,426 (88.5)

115,219 (89.3)

57,084 (89.1)

 Scotland

683 (7.2)

8,732 (6.8)

4,547 (7.1)

 Wales

416 (4.4)

5,144 (4.0)

2,451 (3.8)

Smoking status, N (%)

 Never

4,152 (44.0)

63,886 (49.8)

32,640 (51.2)

 Former

4,204 (44.5)

53,127 (41.4)

26,913 (42.2)

 Current

1,084 (11.5)

11,273 (8.8)

4,198 (6.6)

 Weekly alcohol intake in units, mean (SD)

7.8 (11.0)

10.7 (11.8)

13.0 (12.5)

BMI, N (%)

 Underweight

26 (0.3)

406 (0.3)

438 (0.7)

 Normal

1,440 (15.2)

32,552 (25.3)

25,428 (39.8)

 Overweight

3,663 (38.7)

59,684 (46.4)

27,982 (43.8)

 Obese

4,330 (45.8)

35,964 (28.0)

9,991 (15.7)

Diabetes, N (%)

 No

7,769 (81.6)

120,546 (93.38)

59.846 (93.39)

 Yes

1,756 (18.4)

8,549 (6.6)

4,236 (6.6)

Hypertension, N (%)

 No

1,100 (11.9)

26,334 (22.1)

14,900 (25.9)

 Yes

8,166 (88.1)

92,664 (77.9)

42,706 (74.1)

Physical activity

  Low (≦1200 MET minutes per week)

3,208 (45.8)

35,462 (35.1)

16,199 (31.4)

  High (> 1200 MET minutes per week)

3,804 (54.3)

65,658 (64.9)

35,379 (68.6)

APOE alleles, N (%)

 ε3/ε3

5,657 (61.2)

75,296 (60.4)

37,092 (60.0)

 ε4/ε4 or ε3/ε4

2,227 (24.2)

32,298 (25.9)

16,962 (27.5)

 ε2/ε2 or ε3/ε2

1,306 (14.2)

16,984 (13.6)

7,721 (12.5)

Non-APOE dementia PRS, N (%)

 Low

1,521 (19.7)

21,127 (20.0)

10,607 (20.1)

 Intermediate

4,663 (60.5)

63,585 (60.1)

31,517 (59.7)

 High

1,526 (19.8)

21,087 (19.9)

10,641 (20.2)

  1. Abbreviations: APOE Apolipoprotein E, BMI Body Mass Index, eGFRcr-cys Estimated Glomerular Filtration Rate Creatinine-Cystatin C Equation, GBP British Pound Sterling, MET Metabolic Equivalent of Task, N Number of participants, PRS Polygenic Risk Score, SD Standard Deviation