title: Assessments of neutrophil to lymphocyte ratio and platelet to lymphocyte ratio in Korean patients with psoriasis vulgaris and psoriatic arthritis.
abstract: The objective of this retrospective study is to assess neutrophil to lymphocyte ratio (NLR) and platelet to lymphocyte ratio (PLR) as inflammatory markers in patients with psoriasis and psoriatic arthritis (PsA). A hundred and eleven psoriasis patients and 25 PsA patients were compared with 94 healthy controls. Demographic, clinical and laboratory information were collected and analyzed. NLR and PLR were calculated. White blood cell (WBC), neutrophils, eosinophils and NLR were increased in psoriasis patients compared with controls. WBC, neutrophils, NLR, monocytes, platelets and PLR were increased in PsA patients compared with both controls and psoriasis patients. Erythrocyte sedimentation rate (ESR) and C-reactive protein were significantly higher in PsA patients compared with psoriasis patients. Among psoriasis patients, Psoriasis Area and Severity Index (PASI) score correlated positively with platelets, NLR and PLR. These parameters were all significantly higher in moderate to severe psoriasis patients (PASI ≥ 10) compared with mild patients (PASI < 10). Elevated platelets, NLR and PLR were significantly associated with the increased PASI scores in multivariate analysis. NLR, PLR and ESR were statistically significant predictors for the presence of PsA in psoriasis patients. NLR was the strongest predictor (odds ratio = 3.351, P = 0.005). In conclusion, elevated NLR and PLR were significantly associated with psoriasis and PsA. Both NLR and PLR were strong predictors for the presence of PsA among psoriasis patients.
authors.affiliation: Department of Dermatology, Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
authors.forename: Dae Suk
authors.initials: DS
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
authors.forename: Dongyun
authors.initials: D
authors.lastname: Shin
authors.affiliation: Department of Dermatology, Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
authors.forename: Min Seok
authors.initials: MS
authors.lastname: Lee
authors.affiliation: Department of Dermatology, Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
authors.forename: Hee Ju
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea.
authors.forename: Do Young
authors.initials: DY
authors.lastname: Kim
authors.affiliation: Department of Dermatology, National Health Insurance Service Ilsan Hospital, Goyang, South Korea.
authors.forename: Soo Min
authors.initials: SM
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea.|Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea.
authors.forename: Min-Geol
authors.initials: MG
authors.lastname: Lee
mesh_terms: D015535:Arthritis, Psoriatic / Q000097:blood* / Q000473:pathology; D044466:Asian People; D016022:Case-Control Studies; D003430:Cross-Sectional Studies; D006801:Humans; D007958:Leukocyte Count; D009504:Neutrophils; D010976:Platelet Count; D011565:Psoriasis / Q000097:blood* / Q000473:pathology; D012189:Retrospective Studies
keywords: inflammation; neutrophil to lymphocyte ratio; platelet to lymphocyte ratio; psoriasis vulgaris; psoriatic arthritis