New Creatinine- and Cystatin C-Based Equations to Estimate GFR without Race
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New Creatinine- and Cystatin C-Based Equations to Estimate GFR without Race. / Inker, Lesley A.; Eneanya, Nwamaka D.; Coresh, Josef; Tighiouart, Hocine; Wang, Dan; Sang, Yingying; Crews, Deidra C.; Doria, Alessandro; Estrella, Michelle M.; Froissart, Marc; Grams, Morgan E.; Greene, Tom; Grubb, Anders; Gudnason, Vilmundur; Gutierrez, Orlando M.; Kalil, Roberto; Karger, Amy B.; Mauer, Michael; Navis, Gerjan; Nelson, Robert G.; Poggio, Emilio D.; Rodby, Roger; Rossing, Peter; Rule, Andrew D.; Selvin, Elizabeth; Seegmiller, Jesse C.; Shlipak, Michael G.; Torres, Vicente E.; Yang, Wei; Ballew, Shoshana H.; Couture, Sara J.; Powe, Neil R.; Levey, Andrew S.; Chronic Kidney Dis Epidemiology Co.
In: New England Journal of Medicine, Vol. 385, 2021, p. 1737-1749.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - New Creatinine- and Cystatin C-Based Equations to Estimate GFR without Race
AU - Inker, Lesley A.
AU - Eneanya, Nwamaka D.
AU - Coresh, Josef
AU - Tighiouart, Hocine
AU - Wang, Dan
AU - Sang, Yingying
AU - Crews, Deidra C.
AU - Doria, Alessandro
AU - Estrella, Michelle M.
AU - Froissart, Marc
AU - Grams, Morgan E.
AU - Greene, Tom
AU - Grubb, Anders
AU - Gudnason, Vilmundur
AU - Gutierrez, Orlando M.
AU - Kalil, Roberto
AU - Karger, Amy B.
AU - Mauer, Michael
AU - Navis, Gerjan
AU - Nelson, Robert G.
AU - Poggio, Emilio D.
AU - Rodby, Roger
AU - Rossing, Peter
AU - Rule, Andrew D.
AU - Selvin, Elizabeth
AU - Seegmiller, Jesse C.
AU - Shlipak, Michael G.
AU - Torres, Vicente E.
AU - Yang, Wei
AU - Ballew, Shoshana H.
AU - Couture, Sara J.
AU - Powe, Neil R.
AU - Levey, Andrew S.
AU - Chronic Kidney Dis Epidemiology Co
PY - 2021
Y1 - 2021
N2 - New Equations for Estimating GFR without Race Equations for estimating GFR with serum creatinine overestimate measured GFR in Blacks. The authors report new equations, without race as an inflation factor, using cystatin C and creatinine that reduced errors in estimation between Black participants and non-Black participants.Background Current equations for estimated glomerular filtration rate (eGFR) that use serum creatinine or cystatin C incorporate age, sex, and race to estimate measured GFR. However, race in eGFR equations is a social and not a biologic construct. Methods We developed new eGFR equations without race using data from two development data sets: 10 studies (8254 participants, 31.5% Black) for serum creatinine and 13 studies (5352 participants, 39.7% Black) for both serum creatinine and cystatin C. In a validation data set of 12 studies (4050 participants, 14.3% Black), we compared the accuracy of new eGFR equations to measured GFR. We projected the prevalence of chronic kidney disease (CKD) and GFR stages in a sample of U.S. adults, using current and new equations. Results In the validation data set, the current creatinine equation that uses age, sex, and race overestimated measured GFR in Blacks (median, 3.7 ml per minute per 1.73 m(2) of body-surface area; 95% confidence interval [CI], 1.8 to 5.4) and to a lesser degree in non-Blacks (median, 0.5 ml per minute per 1.73 m(2); 95% CI, 0.0 to 0.9). When the adjustment for Black race was omitted from the current eGFR equation, measured GFR in Blacks was underestimated (median, 7.1 ml per minute per 1.73 m(2); 95% CI, 5.9 to 8.8). A new equation using age and sex and omitting race underestimated measured GFR in Blacks (median, 3.6 ml per minute per 1.73 m(2); 95% CI, 1.8 to 5.5) and overestimated measured GFR in non-Blacks (median, 3.9 ml per minute per 1.73 m(2); 95% CI, 3.4 to 4.4). For all equations, 85% or more of the eGFRs for Blacks and non-Blacks were within 30% of measured GFR. New creatinine-cystatin C equations without race were more accurate than new creatinine equations, with smaller differences between race groups. As compared with the current creatinine equation, the new creatinine equations, but not the new creatinine-cystatin C equations, increased population estimates of CKD prevalence among Blacks and yielded similar or lower prevalence among non-Blacks. Conclusions New eGFR equations that incorporate creatinine and cystatin C but omit race are more accurate and led to smaller differences between Black participants and non-Black participants than new equations without race with either creatinine or cystatin C alone. (Funded by the National Institute of Diabetes and Digestive and Kidney Diseases.)
AB - New Equations for Estimating GFR without Race Equations for estimating GFR with serum creatinine overestimate measured GFR in Blacks. The authors report new equations, without race as an inflation factor, using cystatin C and creatinine that reduced errors in estimation between Black participants and non-Black participants.Background Current equations for estimated glomerular filtration rate (eGFR) that use serum creatinine or cystatin C incorporate age, sex, and race to estimate measured GFR. However, race in eGFR equations is a social and not a biologic construct. Methods We developed new eGFR equations without race using data from two development data sets: 10 studies (8254 participants, 31.5% Black) for serum creatinine and 13 studies (5352 participants, 39.7% Black) for both serum creatinine and cystatin C. In a validation data set of 12 studies (4050 participants, 14.3% Black), we compared the accuracy of new eGFR equations to measured GFR. We projected the prevalence of chronic kidney disease (CKD) and GFR stages in a sample of U.S. adults, using current and new equations. Results In the validation data set, the current creatinine equation that uses age, sex, and race overestimated measured GFR in Blacks (median, 3.7 ml per minute per 1.73 m(2) of body-surface area; 95% confidence interval [CI], 1.8 to 5.4) and to a lesser degree in non-Blacks (median, 0.5 ml per minute per 1.73 m(2); 95% CI, 0.0 to 0.9). When the adjustment for Black race was omitted from the current eGFR equation, measured GFR in Blacks was underestimated (median, 7.1 ml per minute per 1.73 m(2); 95% CI, 5.9 to 8.8). A new equation using age and sex and omitting race underestimated measured GFR in Blacks (median, 3.6 ml per minute per 1.73 m(2); 95% CI, 1.8 to 5.5) and overestimated measured GFR in non-Blacks (median, 3.9 ml per minute per 1.73 m(2); 95% CI, 3.4 to 4.4). For all equations, 85% or more of the eGFRs for Blacks and non-Blacks were within 30% of measured GFR. New creatinine-cystatin C equations without race were more accurate than new creatinine equations, with smaller differences between race groups. As compared with the current creatinine equation, the new creatinine equations, but not the new creatinine-cystatin C equations, increased population estimates of CKD prevalence among Blacks and yielded similar or lower prevalence among non-Blacks. Conclusions New eGFR equations that incorporate creatinine and cystatin C but omit race are more accurate and led to smaller differences between Black participants and non-Black participants than new equations without race with either creatinine or cystatin C alone. (Funded by the National Institute of Diabetes and Digestive and Kidney Diseases.)
KW - GLOMERULAR-FILTRATION-RATE
KW - SERUM CREATININE
KW - NATIONAL-HEALTH
KW - CALIBRATION
KW - PREVALENCE
U2 - 10.1056/NEJMoa2102953
DO - 10.1056/NEJMoa2102953
M3 - Journal article
C2 - 34554658
VL - 385
SP - 1737
EP - 1749
JO - New England Journal of Medicine
JF - New England Journal of Medicine
SN - 0028-4793
ER -
ID: 281651803