TABLE 4.

Reference range data from normal adults for three consecutive years (1995 to 1997)

Analyte and yr	No. of subjects	Concn (mean ± SD)	Rangea
Neopterin (nmol/liter)
1995	32	5.34 ± 2.09	3.68–6.78
1996	24	4.87 ± 1.92	2.80–8.49
1997	17	4.62 ± 2.93	2.71–5.85
β2M (mg/liter)
1995	33	1.17 ± 0.53	0.93–1.61
1996	26	1.16 ± 0.27	0.87–1.55
1997	21	1.15 ± 0.30	0.86–1.56
sTNF-RII (ng/ml)
1995	18	1.77 ± 0.75	1.02–2.50
1996	9	1.99 ± 0.86	1.31–3.40
1997	9	1.94 ± 0.35	1.34–2.35

^a10th to 90th percentiles.