Risk of moderate to advanced kidney disease in patients with psoriasis: population based cohort study

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Abstract

Objective To determine the risk of chronic kidney disease in patients with psoriasis.

Design Population based cohort study and nested cross sectional study.

Setting Electronic medical records database based in United Kingdom.

Participants Cohort study: patients with psoriasis aged 18-90 each matched to up to five patients without psoriasis based on age, practice, and time of visit. Nested study: patients with psoriasis aged 25-64 with confirmed data on psoriasis severity, each matched to up to 10 patients without psoriasis based on age and practice.

Main outcome measures Cohort study: incident moderate to advanced (stage 3 through 5) chronic kidney disease. Nested study: baseline prevalence of chronic kidney disease.

Results 136 529 patients with mild psoriasis and 7354 patients with severe psoriasis based on treatment patterns were matched to 689 702 unaffected patients. The adjusted hazard ratios (95% confidence intervals) for incident chronic kidney disease were 1.05 (1.02 to 1.07), 0.99 (0.97 to 1.02), and 1.93 (1.79 to 2.08) in the overall, mild, and severe psoriasis groups, respectively. Age was a significant effect modifier in the severe psoriasis group, with age specific adjusted hazard ratios (95% confidence intervals) of 3.82 (3.15 to 4.64) and 2.00 (1.86 to 2.17) for patients aged 30 and 60, respectively. In the nested analysis of 8731 patients with psoriasis with measurements of affected body surface area matched to 87 310 patients without psoriasis, the adjusted odds ratios (95% confidence intervals) for chronic kidney disease were 0.89 (0.72 to 1.10), 1.36 (1.06 to 1.74), and 1.58 (1.07 to 2.34) in the mild, moderate, and severe psoriasis groups, respectively.

Conclusions Moderate to severe psoriasis is associated with an increased risk of chronic kidney disease independent of traditional risk factors.

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Most cited references 29

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Pathogenesis and clinical features of psoriasis.

Christopher EM Griffiths, Jonathan Barker (2007)

Psoriasis, a papulosquamous skin disease, was originally thought of as a disorder primarily of epidermal keratinocytes, but is now recognised as one of the commonest immune-mediated disorders. Tumour necrosis factor alpha, dendritic cells, and T-cells all contribute substantially to its pathogenesis. In early-onset psoriasis (beginning before age 40 years), carriage of HLA-Cw6 and environmental triggers, such as beta-haemolytic streptococcal infections, are major determinants of disease expression. Moreover, at least nine chromosomal psoriasis susceptibility loci have been identified. Several clinical phenotypes of psoriasis are recognised, with chronic plaque (psoriasis vulgaris) accounting for 90% of cases. Comorbidities of psoriasis are attracting interest, and include impairment of quality of life and associated depressive illness, cardiovascular disease, and a seronegative arthritis known as psoriatic arthritis. A more complete understanding of underlying pathomechanisms is leading to new treatments, which will be discussed in the second part of this Series.

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Prevalence of metabolic syndrome in patients with psoriasis: A population-based study in the United Kingdom

Sinead Langan, Nicole M. Seminara, Daniel B Shin … (2011)

Increasing epidemiological evidence suggests independent associations between psoriasis and cardiovascular and metabolic disease. Our objective was to test the hypothesis that directly-assessed psoriasis severity relates to the prevalence of metabolic syndrome and its components. Population-based, cross-sectional study using computerized medical records from The Health Improvement Network Study population included individuals aged 45-65 years with psoriasis and practice-matched controls. Psoriasis diagnosis and extent were determined using provider-based questionnaires. Metabolic syndrome was defined using National Cholesterol Education Program (NCEP) Adult Treatment Panel (ATP) III criteria. 44,715 individuals were included: 4,065 with psoriasis and 40,650 controls. 2,044 participants had mild psoriasis (≤2% body surface area (BSA)), 1,377 had moderate (3-10% BSA), and 475 had severe psoriasis (>10% BSA). Psoriasis was associated with metabolic syndrome, adjusted odds ratio (OR) 1.41 (95% CI 1.31-1.51), varying in a “dose-response” manner, from mild (adj. OR 1.22, 95% CI 1.11-1.35) to severe psoriasis (adj. OR 1.98, 95% CI 1.62-2.43). Psoriasis is associated with metabolic syndrome and the association increases with increasing disease severity. Furthermore, associations with obesity, hypertriglyceridemia and hyperglycemia increase with increasing disease severity independent of other metabolic syndrome components. These findings suggest that screening for metabolic disease should be considered for psoriasis, especially when extensive.

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Cause-specific mortality in patients with severe psoriasis: a population-based cohort study in the U.K.

Andrea L Neimann, Rahat S Azfar, Scott A. Troxel … (2010)

Severe psoriasis is associated with excess mortality and increased risk of cardiovascular death. Population-based data evaluating cause-specific mortality in patients with psoriasis are limited. To describe cause-specific mortality in patients with severe psoriasis. We performed a cohort study from 1987 to 2002 of patients ≥18 years using the General Practice Research Database. We compared patients with a psoriasis code and a history of systemic therapy consistent with severe psoriasis (n=3603) with patients with no history of psoriasis (n=14,330). Age- and sex-adjusted Cox models were created for each of the leading causes of death defined by the Centers for Disease Control. Patients with severe psoriasis were at increased risk of death from cardiovascular disease [hazard ratio (HR) 1·57, 95% confidence interval (CI) 1·26-1·96], malignancies (HR 1·41, 95% CI 1·07-1·86), chronic lower respiratory disease (HR 2·08, 95% CI 1·24-3·48), diabetes (HR 2·86, 95% CI 1·08-7·59), dementia (HR 3·64, 95% CI 1·36-9·72), infection (HR 1·65, 95% CI 1·26-2·18), kidney disease (HR 4·37, 95% CI 2·24-8·53) and unknown/missing causes (HR 1·43, 95% CI 1·09-1·89). The absolute and excess risk of death was highest for cardiovascular disease (61·9 and 3·5 deaths per 1000 patient-years, respectively). Severe psoriasis is associated with an increased risk of death from a variety of causes, with cardiovascular death being the most common aetiology. These patients were also at increased risk of death from causes not previously reported, such as infection, kidney disease and dementia. Additional studies are necessary to determine the degree to which excess causes of death are due to psoriasis, its treatments, associated behaviours, or other factors. © The Authors. BJD © 2010 British Journal of Dermatology.

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Author and article information

Contributors

: Role: resident physician

: Role: predoctoral research fellow

: Role: senior research investigator

: Role: assistant professor of pediatrics

: Role: predoctoral research fellow

: Role: associate professor

Journal

Journal ID (nlm-ta): BMJ

Journal ID (iso-abbrev): BMJ

Journal ID (publisher-id): bmj

Title: BMJ : British Medical Journal

Publisher: BMJ Publishing Group Ltd.

ISSN (Print): 0959-8138

ISSN (Electronic): 1756-1833

Publication date Collection: 2013

Publication date (Print): 2013

Publication date (Electronic): 15 October 2013

Volume: 347

Electronic Location Identifier: f5961

Affiliations

[1 ]Department of Dermatology, University of Pennsylvania, Philadelphia, PA 19104, USA

[2 ]Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, PA 19104, USA

[3 ]Department of Nephrology, The Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA

Author notes

Correspondence to: J M Gelfand, Department of Dermatology and Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, 1471 Penn Tower, One Convention Avenue, Philadelphia, PA 19104, USA joel.gelfand@ 123456uphs.upenn.edu

Article

Publisher ID: wanj013246

DOI: 10.1136/bmj.f5961

PMC ID: 3805477

PubMed ID: 24129480

SO-VID: 3bd52d7a-919b-4804-98b4-de1c7581ba26

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This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 3.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/3.0/.

Risk of moderate to advanced kidney disease in patients with psoriasis: population based cohort study

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Most cited references 29

Pathogenesis and clinical features of psoriasis.

Prevalence of metabolic syndrome in patients with psoriasis: A population-based study in the United Kingdom

Cause-specific mortality in patients with severe psoriasis: a population-based cohort study in the U.K.

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