Validity and reliability of the Polish version of the Michigan Neuropathy Screening Instrument

Table 5 The cut-off points for Michigan Neuropathy Screening Instrument Polish version at the two time points and their sensitivity and specificity, and their positive and negative predictive values based on receiver operating characteristic curves

Variable	True positives, n, %	False positives, n, %	False negatives, n, %	True negatives, n, %	Sensitivity	Specificity	Optimal cut-off point
A1	28/35	0/0	42/52.5	10/12.5	0.400	1.000	3
B1	57/71.25	3/3.75	13/16.25	7/8.75	0.814	0.700	2
A2	23/28.75	1/1.25	47/58.75	9/11.25	0.329	0.900	3
B2	59/73.75	4/5	11/13.75	6/7.5	0.843	0.600	2

A1: Patient version; A2: Patient version (after 1-2 wk); B1: Patient examination; B2: Patient examination (after 1-2 wk).