Fig. 3.

Neopterin levels in elderly.

(a) The concentration of neopterin at arrival to hospital (in nmol/L) was measured for the control group of healthy elderly > 75 years old (black circles, n = 42) and was analyzed for the hip-fracture patients according to 2 clinical outcomes at one-year post fracture: survivors (black squares, n = 50) or non-survivors (black triangles, n = 10). p values are calculate with a non-parametric Mann-Whitney test.

(b) Distribution of the number of patients within each clinical subgroup (control healthy elderly/survivors post hip-fracture/non-survivors post hip-fracture), according to the upper 95% confidence interval of the mean of the neopterin concentration obtained from the elderly control cohort included in our study (n = 42). This value of 18.7 nmol/L separates individuals in two groups according to their neopterin level; low (white bar) vs high (black bar).