Figure 1From: Lower circulating preptin levels in male patients with osteoporosis are correlated with bone mineral density and bone formation There existed significantly positive correlation between serum preptin levels and all three BMD, that is, preptin levels correlated positively with L 2-4 BMD ( P <0.001), femur neck BMD ( P <0.001), and total hip BMD ( P <0.001). Back to article page