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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: J Bone Miner Res. 2014 Sep;29(9):2090–2100. doi: 10.1002/jbmr.2241

Table 4.

Characteristics of Fracture Classifiers based on Subsets of Weighting Factors

Fracture Classifier Number of SSDM Weighting Factors Included Total Variability Explained by Selected Weighting Factors
SSDM & Age 20 53.8
SSDM (WFs > 10%) & Age 3 46.7
SSDM (WFs > 1%) & Age 5 52.3
SSDM (WFs < 1%) & Age 15 1.5

Note: Parenthetical descriptions of weighting factor subsets refer to the variability that is explained individually by each principal component weighting factor. For instance, there are 3 weighting factors that each describe greater than 10% of the total variability in the set of femurs.