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. 2017 Mar 17;8(24):39849–39858. doi: 10.18632/oncotarget.16337

Figure 3. Dose-response relationship between serum 25(OH)D and relative risk of hip fracture.

Figure 3

Solid line represents adjusted relative risk and dotted lines represent the 95% confidence intervals for the fitted trend. Adj.RR of hip fracture is a descending curve below the line of RR = 1. The descending trend was obvious when serum 25(OH)D level was less than 60 nmol/L, and flat when serum 25(OH)D was higher than 60 nmol/L; there was no significant linear association between the serum 25(OH)D levels and the risk of hip fracture (P = 0.110 for non-linearity).