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C reactive protein and depressive symptoms in hemodialysis patients: A questionable association

Chilcot, J; Friedli, K; Guirguis, A; Wellsted, D; Farrington, K; Davenport, A; (2017) C reactive protein and depressive symptoms in hemodialysis patients: A questionable association. Hemodialysis International , 21 (4) pp. 542-548. 10.1111/hdi.12500. Green open access

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Abstract

Introduction: Patients with advanced chronic kidney disease (CKD) on haemodialysis (HD) may have increased C reactive protein (CRP) values and depressive symptoms. There is debate about the strength and nature of previously reported associations. We investigated these issues in a cohort of patients on HD. Methods: We screened for depressive symptoms using two valadiated depression screening tools: the Beck Depression Inventory‐II (BDI‐II), Patient Health Questionnaire (PHQ‐9). Demographic and clinical correlates of depression symptoms were eveluated in adjusted linear and logistic regression models, which included extra renal comorbidity and high CRP (>5 mg/L). Findings: Three hundred and ninety‐six HD patients were studied; 63.1% male, mean age 63.1 ± 16.4 years, median CRP 6 (5–15) mg/L. Depression scores were similar in those with normal and high CRP (BDI‐II (9(5–17) vs. 11(6–20)) or PHQ (4(2–9) vs. 6(2–10)). In adjusted multivariable regression BDI‐II scores were associated with previous history of depression (β 10.8, P < 0.001), serum albumin (β 0.41, P < 0.001), anuria (β 2.4, P < 0.037), diabetes (β 2.7, P = 0.033), and age (β −0.10, P = 0.009). High CRP was not independently associated with BDI‐II (β 2.20, P = 0.057), though was with PHQ‐9 (β 1.20, P = 0.046). In logistic regression those with high CRP were 1.9 times more likely to score ≥16 on BDI‐II screening (P = 0.016), but did not relate significantly to a PHQ‐score ≥10. Discussion: A relationship was observed between CRP and depression symptoms, though the effect was small, of unlikely clinical significance, and inconsistent between depression measures. Previous reports of this association may reflect overlap between symptoms of depression and advanced CKD.

Type: Article
Title: C reactive protein and depressive symptoms in hemodialysis patients: A questionable association
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/hdi.12500
Publisher version: https://doi.org/10.1111/hdi.12500
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: C reactive protein, depression, BDI‐II, PHQ‐9, dialysis, inflammation
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine
URI: https://discovery.ucl.ac.uk/id/eprint/10053135
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