Table 3

Performance of VPT testing on the great toe

n*SensitivitySpecificityPPVNPV% correctκ
Definite clinical neuropathy
    Total cohort1,17080 (76–84)51 (47–54)4981620.271
    Aged 36–50 years69175 (69–81)50 (46–55)4281580.208
    Aged 51–65 years42087 (82–92)47 (41–54)5980660.330
Abnormal nerve conduction
    Total cohort1,17075 (72–78)62 (58–67)7661700.271
    Aged 36–50 years69172 (68–77)63 (57–68)7461680.350
    Aged 51–65 years42081 (76–85)57 (48–65)8058730.377
Confirmed clinical neuropathy
    Total cohort1,17087 (84–91)51 (47–54)4390620.296
    Aged 36–50 years69184 (78–89)51 (46–55)3790590.241
    Aged 51–65 years42093 (89–97)47 (41–53)5391650.348
  • Data are % (95% CI) unless otherwise indicated.

  • *n = 7 subjects who are missing a great toe measurement.