Table 3.

VPT from studies^24,28,30,33.

Study	Group	N	Vibration perception threshold (VPT) (V)
Petropoulos et al.24	Control	55	5.8 ± 4.6
	No-DSPN	86	9.2 ± 6.5
	DSPN	100	22.3 ± 12.6
Tavakoli et al.28	Control	17	9.58 ± 0.93
	No-DSPN	34	9.56 ± 0.84
	DSPN	67	24.93 ± 9.82
Chen et al.30	Control	26	6 ± 5.5
	No-DSPN	46	7.6 ± 5.5
	DSPN	17	25.2 ± 13.4
Alam et al.33	Control	27	5.3 ± 4.1
	No-DSPN	30	5.6 ± 2.5
	DSPN	31	18.4 ± 12.2
Total	Control	125	6.51 ± 4.66
	No-DSPN	196	8.83 ± 5.55
	DSPN	215	23.53 ± 11.75