Table 1. Outcome measures and significance of electrophysical modalities versus placebo.

Author	Intervention	VAS	SS	FS	ML	SL	MNCV	SNCV	SNAP (A)	CMAP (A)	Grip strength	Pinch strength
Armagan et al.	US + SP	+	+	+	+	+	+	+
Jothi and Bland.	US + SP		+	+	+			+
Oztas et al.	US				+	+	+	+
Wu et al.	ESWT	+	+	+				+				+
Ke et al.	ESWT		+ -	+ -				+ -
Abid Ali et al.	LLLT	+ -	+ -	+ -	+ -	+	+ -	+	+ -	+ -
Jiang et al.	LLLT	+ *	+—*		+ -	+ -
Tascioglu et al.	LLLT	+	+	+	+		+	+			+
Shooshtari et al.	LLLT	+ -			+	+		+			+
Chang et al.	LLLT		+	+ -	+	+					+
Lazovic et al.	LLLT	+ °			+			+ -
Fusakul et al.	LLLT + SP	+ -	+ -	+	+ -	+ -			+ -	+	+ -	+ -
Evcik et al.	LLLT + SP
Boyaci et al.	SWD + SP	+	+	+	+	+		+
Badur et al.	SWD + SP	+
Carter et al.	SMF	+
Colbert et al.	SMF		+	+	+	+			+	+
Weintraub and Cole.	SMF+PMF	+
Arikan et al.	PMF	+ °	+		+	+ -	+	+	+	+

Abbreviations: VAS: Visual analog scale; SS: Symptom severity; FS: Functional status; ML: Motor latency; SL: Sensory latency; MNCV: Motor nerve conduction velocity; SNCV: Sensory nerve conduction velocity; SNAP (A): Sensory nerve action potential amplitude; CMAP (A): Compound muscle action potential amplitude. Annotation symbols: Measured: +; Statistically significant: -; Not included in the meta-analysis: °; Only in the mild group: *.