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. Author manuscript; available in PMC: 2022 May 1.

Published in final edited form as: Pain. 2020 Nov 11:10.1097/j.pain.0000000000002144. doi: 10.1097/j.pain.0000000000002144

Table 5.

Number Needed to Treat (NNT) and Number needed to Harm (NNH) for TENS

		Compared to placebo-TENS	Compared to no-TENS
NNT	Pain	4.5	3.3
NNT	Fatigue	5.3	4.5
NNH	Serious adverse events	N/A	N/A
	Itchiness	100	50
	Anxiety	50	50
	Pain with TENS	50	20
	Nausea	33	50
	Skin Irritation	25	20
	All minor events	8	6