Pain relief ‐ descriptive data
Study	Pain scale used	HF TENS	LF TENS	Conclusion
Thomas 1995	Total Pain on 100mm VAS scale ‐ measured 3 x day for 3 days ‐ Max score 900 Pretreatment score mean: 375 std dev: 157	mean: 553 std dev: 128 n: 12	mean: 245 std dev: 187 n: 12	Low frequency TENS more likely to reduce pain than High frequency TENS (using ANOVA p<0.05)