TY - JOUR
T1 - Cystatin C and Cognitive Impairment 10 Years Later in Older Women
AU - Slinin, Yelena
AU - Peters, Katherine W.
AU - Ishani, Areef
AU - Yaffe, Kristine
AU - Fink, Howard A.
AU - Stone, Katie L.
AU - Steffes, Michael
AU - Ensrud, Kristine E.
AU - for the Study of Osteoporotic Fractures
N1 - Publisher Copyright:
© The Author 2014. Published by Oxford University Press on behalf of the Gerontological Society of America. All rights reserved.
PY - 2015/6
Y1 - 2015/6
N2 - Background. Results of prospective studies examining the association between cystatin C and incident cognitive impairment have been inconsistent. We tested the hypothesis that there is a U-shaped association in older women between cystatin C and risk of incident cognitive impairment 10 years later. Methods. We conducted a longitudinal analysis of a prospective cohort of 1,332 communitydwelling elderly women without dementia at baseline who had baseline cystatin C and serum creatinine measurements and completed an extended cognitive battery of neuropsychological tests with determination of cognitive status 10 years later. Incident cognitive impairment was defined as either new onset of adjudicated diagnosis of mild cognitive impairment or dementia. Results. Incident mild cognitive impairment or dementia was identified among 140 (26.0%) women in quartile 1 (Q1), 122 (22.6%) in Q2, 121 (22.5%) in Q3, and 156 (28.9%) in Q4 of cystatin C. In the fully adjusted model, compared to women in Q2-Q3 of cystatin C, adjusted odds ratios (95% CI) for incident cognitive impairment were 1.31 (0.98-1.75) for Q1, and 1.25 (0.94-1.66) for Q4 Compared to women in Q2-Q3 of estimated glomerular filtration rate (EGFRCysC), adjusted odds ratios (95% CI) for incident cognitive impairment after 10 years of follow-up were 1.18 (0.88-1.58) for Q4 (EGFRCysC 76.1-109.4 mL/min/1.73 m2) and 1.26 (0.94-1.67) for Q1 (EGFRCysC 21.8-55.5 mL/min/1.73 m2). Conclusions. These results support a U-shaped association between cystatin C concentration and risk of cognitive impairment or dementia 10 years later, but the association is not independent of potential confounding factors.
AB - Background. Results of prospective studies examining the association between cystatin C and incident cognitive impairment have been inconsistent. We tested the hypothesis that there is a U-shaped association in older women between cystatin C and risk of incident cognitive impairment 10 years later. Methods. We conducted a longitudinal analysis of a prospective cohort of 1,332 communitydwelling elderly women without dementia at baseline who had baseline cystatin C and serum creatinine measurements and completed an extended cognitive battery of neuropsychological tests with determination of cognitive status 10 years later. Incident cognitive impairment was defined as either new onset of adjudicated diagnosis of mild cognitive impairment or dementia. Results. Incident mild cognitive impairment or dementia was identified among 140 (26.0%) women in quartile 1 (Q1), 122 (22.6%) in Q2, 121 (22.5%) in Q3, and 156 (28.9%) in Q4 of cystatin C. In the fully adjusted model, compared to women in Q2-Q3 of cystatin C, adjusted odds ratios (95% CI) for incident cognitive impairment were 1.31 (0.98-1.75) for Q1, and 1.25 (0.94-1.66) for Q4 Compared to women in Q2-Q3 of estimated glomerular filtration rate (EGFRCysC), adjusted odds ratios (95% CI) for incident cognitive impairment after 10 years of follow-up were 1.18 (0.88-1.58) for Q4 (EGFRCysC 76.1-109.4 mL/min/1.73 m2) and 1.26 (0.94-1.67) for Q1 (EGFRCysC 21.8-55.5 mL/min/1.73 m2). Conclusions. These results support a U-shaped association between cystatin C concentration and risk of cognitive impairment or dementia 10 years later, but the association is not independent of potential confounding factors.
KW - Aging
KW - Cognitive impairment
KW - Cystatin C
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U2 - 10.1093/gerona/glu189
DO - 10.1093/gerona/glu189
M3 - Article
C2 - 25362662
AN - SCOPUS:84954154842
SN - 1079-5006
VL - 70
SP - 771
EP - 778
JO - Journals of Gerontology - Series A Biological Sciences and Medical Sciences
JF - Journals of Gerontology - Series A Biological Sciences and Medical Sciences
IS - 6
ER -