Alpha Lipoic Acid for Symptomatic Peripheral Neuropathy in Patients with Diabetes: A Meta-Analysis of Randomized Controlled Trials

Table 2

Total Symptom Score (TSS): scoring system for neuropathic symptoms (pain, burning, paresthesia, and numbness). The score can range from 0 (no symptoms) to maximally 14.64 (all symptoms present, severe, continuous).

Symptom frequency	Symptom intensity
	Absent	Slight	Moderate	Severe
Occasional	0	1.00	2.00	3.00
Frequent	0	1.33	2.33	3.33
(Almost) continuous	0	1.66	2.66	3.66