Table. 3.

Intergroup comparison of preT, postT, and postT3 VAS scores

VAS scores bTENS (n = 25) cTENS (n = 25) pTENS (n = 23) P valuea
Mean VAS scores
postT-preT –3.9 ± 2.4 –4 (–10-0) –2.2 ± 1.9 –2 (–7-0) –2.0 ± 1.7 –2.0 (–6-0) 0.012
postT3-postT –2.6 ± 2.7 –3 (–2-7) –0.2 ± 2.1 0 (–5-3) –0.4 ± 2.3 0.0 (–4-6) 0.260
postT3-preT –1.3 ± 2.7 1 (–2-7) –2.5 ± 2.7 –2 (–9-3) –1.6 ± 2.0 –2.0 (–6-3) 0.358
Night-time VAS scores
postT-preT –2.8 ± 2.9 –2 (–9-1) –1.6 ± 1.9 –1 (–5-0) –2.3 ± 2.4 –2 (–8-0) 0.463
postT3-postT 0.4 ± 1.5 0 (–2-6) 0.1 ± 1.5 0 (–3-3) –0.4 ± 2.3 0 (–5-2) 0.943
postT3-preT –2.4 ± 2.7 –2 (–8-1) –1.5 ± 2.4 –1 (–6-2) –1.8 ± 2.4 –2 (–8-6) 0.569

Values are presented as mean ± standard deviation or median (minimum-maximum).

preT: before treatment, postT: after treatment, postT3: third month after treatment, VAS: visual analogue scale, TENS: transcutaneous electrical nerve stimulation, bTENS: burst TENS, cTENS: conventional TENS, pTENS: placebo TENS.

aKruskal–Wallis test. α = 0.05.

Korean J Pain 2021;34:217~228 https://doi.org/10.3344/kjp.2021.34.2.217
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