TY - JOUR
T1 - Kidney function and cognitive impairment among older hospitalized patients
T2 - a comparison of four glomerular filtration rate equations
AU - Pierpaoli, Elisa
AU - Fabi, Katia
AU - Lenci, Federica Francesca
AU - Ricci, Maddalena
AU - Di Rosa, Mirko
AU - Onder, Graziano
AU - Volpato, Stefano
AU - Ruggiero, Carmelinda
AU - Cherubini, Antonio
AU - Corsonello, Andrea
AU - Lattanzio, Fabrizia
PY - 2019/12/15
Y1 - 2019/12/15
N2 - Background: The relationship between the estimated glomerular filtration rate (eGFR) and cognitive impairment may change as a function of the equation used. We aimed at investigating the association between four different eGFR equations and cognitive impairment among older hospitalized patients. Methods: Our series consisted of 795 older patients consecutively admitted to 7 geriatric and internal medicine acute care wards. The eGFR was calculated by Chronic Kidney Disease Epidemiologic Collaboration (CKD-EPI), Cockcroft-Gault (CG), Berlin Initiative Study (BIS) and Full Age Spectrum (FAS) equations. Study outcomes were total Mini Mental State Examination (MMSE) < 24 and sub-scores related to orientation to time, orientation to space, registration, calculation, three words recall, language and constructional praxis. Statistical analysis was carried out by logistic or Poisson regressions when appropriate. The accuracy of eGFR equations in identifying cognitive outcomes was investigated by calculating the area (AUC) under the receiver operating characteristic (ROC) curve for each equation. Results: After adjusting for potential confounders, eGFR < 30 was significantly associated with MMSE < 24 only with CKD-EPI equation (OR 2.03, 95% CI 1.04–3.96). eGFR < 30 was significantly associated with constructional apraxia with all study equations (CKD-EPI: OR 3.62, 95% CI 1.73–7.56; BIS: OR 2.86, 95% CI 1.31–6.26; FAS: OR 2.83, 95% CI 1.44–5.56; CG: OR 2.08, 95% CI 1.09–3.99). The accuracy of eGFR < 30 in identifying patients with defective constructional praxis was poor with all (BIS: AUC 0.54, 95% CI 0.52–0.55; CKD-EPI: AUC 0.55, 95% CI 0.53–0.57; CG: AUC 0.58, 95% CI 0.55–0.61; FAS: AUC 0.56, 95% CI 0.54–0.58). Conclusions: Constructional apraxia may characterize the cognitive profile of older patients with severe CKD. The accuracy in identifying patients with constructional apraxia is only fair, and studies including other biomarkers of kidney function are needed.
AB - Background: The relationship between the estimated glomerular filtration rate (eGFR) and cognitive impairment may change as a function of the equation used. We aimed at investigating the association between four different eGFR equations and cognitive impairment among older hospitalized patients. Methods: Our series consisted of 795 older patients consecutively admitted to 7 geriatric and internal medicine acute care wards. The eGFR was calculated by Chronic Kidney Disease Epidemiologic Collaboration (CKD-EPI), Cockcroft-Gault (CG), Berlin Initiative Study (BIS) and Full Age Spectrum (FAS) equations. Study outcomes were total Mini Mental State Examination (MMSE) < 24 and sub-scores related to orientation to time, orientation to space, registration, calculation, three words recall, language and constructional praxis. Statistical analysis was carried out by logistic or Poisson regressions when appropriate. The accuracy of eGFR equations in identifying cognitive outcomes was investigated by calculating the area (AUC) under the receiver operating characteristic (ROC) curve for each equation. Results: After adjusting for potential confounders, eGFR < 30 was significantly associated with MMSE < 24 only with CKD-EPI equation (OR 2.03, 95% CI 1.04–3.96). eGFR < 30 was significantly associated with constructional apraxia with all study equations (CKD-EPI: OR 3.62, 95% CI 1.73–7.56; BIS: OR 2.86, 95% CI 1.31–6.26; FAS: OR 2.83, 95% CI 1.44–5.56; CG: OR 2.08, 95% CI 1.09–3.99). The accuracy of eGFR < 30 in identifying patients with defective constructional praxis was poor with all (BIS: AUC 0.54, 95% CI 0.52–0.55; CKD-EPI: AUC 0.55, 95% CI 0.53–0.57; CG: AUC 0.58, 95% CI 0.55–0.61; FAS: AUC 0.56, 95% CI 0.54–0.58). Conclusions: Constructional apraxia may characterize the cognitive profile of older patients with severe CKD. The accuracy in identifying patients with constructional apraxia is only fair, and studies including other biomarkers of kidney function are needed.
KW - Chronic kidney disease
KW - Cognitive impairment
KW - Constructional apraxia
KW - Creatinine
KW - Estimated glomerular filtration rate (eGFR)
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U2 - 10.1007/s40520-019-01405-1
DO - 10.1007/s40520-019-01405-1
M3 - Article
C2 - 31732959
AN - SCOPUS:85075247958
JO - Aging clinical and experimental research
JF - Aging clinical and experimental research
SN - 1594-0667
ER -