title: Correlation of C-reactive protein with disease severity in CT diagnosed emphysema.
abstract: OBJECTIVE
  Recent studies suggest that CRP levels are related to airflow obstruction. However, limited data exist on the relevance of CRP levels in individuals with or without emphysema. The aim of this study was to assess the relationship between the extent of emphysema, COPD severity and serum CRP levels.
  
  
  METHODS
  Lung function tests and high-sensitivity CRP were examined in 651 males with stable disease who underwent CT screening for lung cancer. CRP levels were examined cross-sectionally in individuals with various degrees of emphysema and in those without emphysema.
  
  
  RESULTS
  Emphysema was detected in 179 (34.7%) of 516 current smokers. Airflow obstruction was observed in 47 (28.8%) of 163 smokers with mild emphysema, in eight (57.1%) of 14 smokers with moderate emphysema, and in two of two individuals with severe emphysema. CRP levels were not higher in individuals with mild or moderate emphysema compared with individuals without emphysema. Among 98 individuals with airflow obstruction (19.0% of the 516 current smokers), there was a modest correlation between CRP levels and FEV(1)%.
  
  
  CONCLUSIONS
  The severity of COPD varied in individuals with similar degrees of emphysema. CRP levels were not significantly higher in individuals with mild or moderate emphysema compared with individuals without emphysema but CRP levels were modestly correlated with FEV(1)% among individuals with airflow obstruction.
authors.affiliation: Department of Public Health, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan. omorih@gpo.kumamoto-u.ac.jp
authors.forename: Hisamitsu
authors.initials: H
authors.lastname: Omori
authors.forename: Mayumi
authors.initials: M
authors.lastname: Tsuji
authors.forename: Keiko
authors.initials: K
authors.lastname: Sata
authors.forename: Cieko
authors.initials: C
authors.lastname: Iyonaga
authors.forename: Akiko
authors.initials: A
authors.lastname: Narimatsu
authors.forename: Shuichi
authors.initials: S
authors.lastname: Mihara
authors.forename: Tohru
authors.initials: T
authors.lastname: Marubayashi
authors.forename: Seiji
authors.initials: S
authors.lastname: Tomiguchi
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Nomori
authors.forename: Hirotsugu
authors.initials: H
authors.lastname: Kohrogi
authors.forename: Takahiko
authors.initials: T
authors.lastname: Katoh
mesh_terms: D000328:Adult; D000368:Aged; D002097:C-Reactive Protein / Q000378:metabolism*; D016022:Case-Control Studies; D015331:Cohort Studies; D005541:Forced Expiratory Volume; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D029424:Pulmonary Disease, Chronic Obstructive / Q000097:blood* / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011656:Pulmonary Emphysema / Q000097:blood* / Q000000981:diagnostic imaging* / Q000503:physiopathology; D012720:Severity of Illness Index; D012907:Smoking / Q000097:blood* / Q000473:pathology / Q000503:physiopathology; D013147:Spirometry; D014057:Tomography, X-Ray Computed
chemical_list: D002097:C-Reactive Protein