Table 1

Sensitivity, specificity, predictive values, and likelihood ratios for the MF and IpTT against a VPT ≥25 V as gold standard

Method AMethod B
MFIpTTMFIpTT
Sensitivity (%)85798176
Specificity (%)88909190
PPV89909189
NPV81798177
LHR+7.68.19.17.7
LHR−0.160.240.20.27
  • Method A uses 8 sites (tips of first, third, and fifth toes and dorsum of hallux) and a criterion of ≥2 out of 8 insensate sites to indicate at-risk feet. Method B uses 6 sites (tips of first, third, and fifth toes) and a criterion of ≥2 out of 6 insensate sites to indicate at-risk feet.

  • PPV, positive predictive value; NPV, negative predictive value; LHR+, positive likelihood ratio; LHR−, negative likelihood ratio.