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From:
Published online 2012 March 31. doi: 10.1186/1471-2288-12-40

Table 2

Log-transformed concentrations of CRP and SAA measured by the two analytical assays (nepholometry and ELISA) in COPD patients and healthy controls

Entire cohort
(n = 133)
COPD
(n = 88)
Controls
(n = 45)
p value*
logCRP (Ne)0.5 (0.4)0.6 (0.4)0.3 (0.4)0.002
logCRP (ELISA)0.2 (0.6)0.3 (0.5)0.04 (0.7)0.026
P value†< 0.001< 0.0010.001

logSAA (Ne)0.7 (0.4)0.7 (0.4)0.5 (0.3)0.022
logSAA (ELISA)0.7 (0.4)0.8 (0.4)0.5 (0.5)0.003
P value†NSNSNS

Data expressed as the mean (standard deviation). *p value calculated by unpaired Student's t test. †p value for the difference between nephelometry and ELISA calculated by paired Student's t test.

logCRP (Ne): log-transformed concentrations of C-reactive protein measured by nephelometry.

logCRP (ELISA): log-transformed concentrations of C-reactive protein measured by ELISA.

logSAA (Ne): log-transformed concentrations of serum amyloid A measured by nephelometry.

logSAA (ELISA): log-transformed concentrations of serum amyloid A measured by ELISA.