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Table 2 Comparison of mean VAS scores in two groups

From: The effects of transcutaneous electrical nerve stimulation during the first stage of labor: a randomized controlled trial

Pain Score Experimental group
(N = 161)
Control group
(N = 16)
t-value p-value
Immediately after the randomization 5.56 ± 1.56 5.64 ± 1.66 0.43 0.665
30 min after TENS therapy 5.67 ± 1.71 7.40 ± 1.40 9.96 0.001
60 min after TENS therapy 5.89 ± 1.92 8.78 ± 1.32 15.81 0.001
120 min after TENS therapy 5.45 ± 1.74 9.29 ± 1.39 22.05 0.001
2–24 h after delivery 6.02 ± 1.53 9.43 ± 0.98 23.86 0.001