. 2014 Sep 1;1(3):92–95. doi: 10.5152/eurjrheumatol.2014.032

Table 2.

Correlation between acute phase parameters and ferritin in patients with RA

	ESR (mm/hr)	Ferritin (ng/mL)	CRP (mg/dL)	RF (IU/L)	Hematocrit (%)	Platelets (/mm³)
Ferritin	0.59^*
	<0.001^a
CRP (mg/dL)	0.69	0.59
	<0.001	<0.001
RF (IU/L)	0.3	0.27	0.35
	0.049	0.07	0.02
Hematocrit (%)	−0.46	−0.31	−0.39	−0.021
	0.001	0.04	0.008	0.89
Platelets (/mm³)	0.57	0.52	0.32	0.4	−0.17
	<0.001	<0.001	0.035	0.006	0.27
DAS	0.69	0.34	0.64	0.3	−0.35	0.32
	<0.001	0.02	<0.001	0.047	0.02	0.03

ESR: erythrocyte sedimentation rate; CRP: c-reactive protein; RF: rheumatoid factor; DAS: disease activity score

^(*)

r: Spearman correlation coefficients

^(a)