Table 1.

Neopterin concentrations in HCV responders and nonresponders to antiviral therapy.

	All patients	Responders	Nonresponders	P value
Neopterin (nmol/L)	N = 260	N = 84	N = 176
Mean ± standard deviation	28.8 ± 26.4	22.8 ± 24.8	31.4 ± 27.2	0.015 (Student's t-test)
Median [25th–75th percentile]	19.4 [12.2–36.4]	13.0 [9.4–25.7]	24.4 [15.0–26.8]	<.0001 (Wilcoxon rank-sum test)