A 2×2 contingency table of in vivo corneal confocal microscopy (IVCCM) CNFL DSP threshold versus clinical DSP diagnosis
| England criteria | ||
|---|---|---|
| DSP (−) | DSP (+) | |
| 300 μm CNFLmanual >15 mm/mm2 | 6 | 3 |
| 300 μm CNFLmanual <15 mm/mm2 | 10 | 20 |
CNFL, corneal nerve fiber length; DSP, diabetic sensorimotor polyneuropathy.