title: The comparison of Nail Psoriasis Severity Index with a less time-consuming qualitative system.
abstract: OBJECTIVE
  Reliable assessment of severity in nail psoriasis is essential to document treatment responses in clinical trials and routine clinical usage. In this study the correlation between Nail Psoriasis Severity Index (NAPSI) and Cannavo's scoring system was assessed, and inter-rater correlation of NAPSI scores were evaluated.
  
  
  METHODS
  Forty-five patients with nail psoriasis were included. Target nails were selected and graded by the first dermatologist with both scoring systems. The nails were reevaluated by the second dermatologist with NAPSI.
  
  
  RESULTS
  The two systems were highly correlated (P < 0.001). For NAPSI inter-rater correlation was also significant (P < 0.001).
  
  
  CONCLUSIONS
  Our results showed that the qualitative and quantitative evaluations of the same rater were similar. Although the qualitative scoring system of Cannavo's is less time consuming than NAPSI, to suggest this system inter-rater correlations should be evaluated.
authors.affiliation: Pamukkale University, Dermatology, Denizli, Turkey. n_gelincik@yahoo.com
authors.forename: N
authors.initials: N
authors.lastname: Kaçar
authors.forename: S
authors.initials: S
authors.lastname: Ergin
authors.forename: B S
authors.initials: BS
authors.lastname: Erdoğan
mesh_terms: D006801:Humans; D009260:Nail Diseases / Q000473:pathology* / Q000503:physiopathology; D011565:Psoriasis / Q000473:pathology* / Q000503:physiopathology; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013997:Time Factors