CRP and rheumatoid arthritis: The mean of ESR, CRP, RF and anti-CCP level in the serum samples of RA-risk-associated patients (AA or AT at rs17337023) and RA-non-risk-associated patients (TT at rs17337023) are as follows: ESR, 31.2±26.3 mm/hr for AA/AT carriers and 29.7±21.7 mm/hr for TT carriers; CRP, 2.4±2.5 mg/dL for AA/AT carriers and 1.0±1.3 mg/dL for TT carriers; RF, 451.0±639.5 U/mL for AA/AT carriers and 225.3±338.6 U/mL for TT carriers; anti-CCP, 114.1±21.1 EU/mL for AA/AT carriers and 6.2 EU/mL for TT carriers.