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Table 1 Demographics of Participants characteristics according to quartile of plasma klotho. Values are mean ± SD or n (%)

From: Association between serum klotho levels and cardiovascular disease risk factors in older adults

Plasma klotho (pg/ml)

< 654.6

654.6 to 802.4

802.4 to 993.3

\(\ge\) 992.4

p valuea

N

3288

3286

3291

3289

 

Age (years)

59.10 ± 11.11

57.94 ± 10.84

57.35 ± 10.73

56.35 ± 10.62

< .0001

Sex

    

< .0001

 Male

1669 (26.32%)

1704 (26.87%)

1554 (24.50%)

1414 (22.29%)

 

 Female

1589 (23.42%)

1582 (23.32%)

1737 (25.60%)

1875 (27.64%)

 

Race/ethnicity

    

< .0001

 Mexican American

250 (23.94%)

262 (25.09%)

287 (27.49%)

245 (23.46%)

 

 White

778 (26.35%)

793 (26.86%)

755 (25.57%)

626 (21.20%)

 

 Black

393 (24.88%)

329 (20.83%)

347 (21.97%)

510 (32.29%)

 

 Asian

177 (20.60%)

228 (26.54%)

234 (27.24%)

220 (25.61%)

 

 Other race

1690 (25.14%)

1674 (24.91%)

1668 (24.82%)

1688 (25.11%)

 

Income

    

0.9008

 Low

1776(25.84%)

1689(24.57%)

1710(24.87%)

1698(24.70%)

 

 High

1512(24.07%)

1597(25.42%)

1581(25.17%)

1591(25.33%)

 

Education

    

0.3950

 Less than high school

949 (26.08%)

906 (24.90%)

888 (24.40%)

895 (24.60%)

 

 High school

792 (27.23%)

700 (24.07%)

740 (25.44%)

676 (23.24%)

 

 College or more

1547 (23.41%)

1680 (25.42%)

1663 (25.16%)

1718 (25.99%)

 
  1. Income: low (Total annual family income < $45,000) and high (Total annual family income ≥ $45,000)
  2. aThe p value is based on the T-test for binominal groups and Wald F-test for categorical groups