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Red blood cell distribution width is increased in patients with psoriasis vulgaris: A retrospective study on 261 patients

 Das Suk Kim  ;  Dongyun Shin  ;  Hyunjoong Jee  ;  TaeGyun Kim  ;  Sung Hee Kim  ;  Do Young Kim  ;  Soo Min Kim  ;  Min Geol Lee 
 JOURNAL OF DERMATOLOGY, Vol.42(6) : 567-571, 2015 
Journal Title
Issue Date
Adult ; Case-Control Studies ; Erythrocyte Indices* ; Female ; Humans ; Male ; Middle Aged ; Psoriasis/blood* ; Retrospective Studies ; Severity of Illness Index* ; Young Adult
C-reactive protein ; Psoriasis Area Severity Index ; erythrocyte sedimentation rate ; inflammation ; psoriasis vulgaris ; red blood cell distribution width
Circulating inflammatory cytokines and markers are increased in patients with psoriasis. Recent studies have shown that a higher red blood cell distribution width (RDW) is associated with disease activity in various disorders. Our objective was to investigate whether RDW is increased in psoriasis patients, and to evaluate its possible association with disease severity. We conducted a retrospective study of psoriasis patients seen in a university hospital in South Korea. Information about demographics, hematological parameters and disease severity were collected. Statistical analysis was performed using Student's t-test, multivariable logistic regression, Fisher's exact test and Spearman's rank correlation coefficient analysis as appropriate. A total of 261 psoriasis patients and 102 healthy controls were included in our study. The mean RDW value was significantly increased in psoriasis patients compared with healthy control (P = 0.037). Compared with mild psoriasis patients (Psoriasis Area and Severity Index [PASI], <7), moderate to severe patients (PASI, ≥7) showed significantly higher RDW values (P = 0.044). However, RDW did not show significant correlation with PASI (P = 0.358). When patients were divided into two groups according to their RDW value (<14.6% and ≥14.6%), the mean value of PASI was not significantly different (P = 0.219). Patients with psoriasis showed increased RDW values compared with healthy controls. It was also higher in the moderate and severe disease group than the mild group. Though this is only a pilot study, it is possible that RDW value can reflect the inflammatory status of psoriasis patients.
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1. College of Medicine (의과대학) > Dept. of Dermatology (피부과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Environmental Medical Biology (환경의생물학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
Yonsei Authors
Kim, Dae Suk(김대석)
Kim, Do Young(김도영) ORCID logo https://orcid.org/0000-0002-0194-9854
Kim, Sung Hee(김성희)
Kim, Tae-Gyun(김태균) ORCID logo https://orcid.org/0000-0002-2116-4579
Lee, Min Geol(이민걸) ORCID logo https://orcid.org/0000-0001-7040-5335
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