Osteoporosis prevalence ( BMD T-score < -2.5 SD ) at FN and LS was equivalent in the type 1 and type 2 diabetes groups , but lower in type 2 patients compared with controls ( FN : 13.0 % vs 21.2 % , LS : 6.1 % vs 14.9 % men ; FN : 21.9 % vs 32.1 % , LS : 9.4 % vs 26.9 % women ) .