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Table 2 Comparison of pain severity and duration of pain between two groups in protocol 1

From: Effect of Zingiber officinale R. rhizomes (ginger) on pain relief in primary dysmenorrhea: a placebo randomized trial

  Baseline Protocol 1 Mean change in protocol 1   
  Ginger (n = 59) Placebo (n = 46) Ginger (n = 59) Placebo (n = 46) Ginger (n = 59) Placebo (n = 46)   
  Mean (SD) Mean (SD) Mean (SD) Mean (SD) Mean (SD) Mean (SD) Pa Pb
Severity of pain 7.34 (1.1) 7.52 (0.93) 5.12 (2.69) 6.58 (2.02) 2.21 (2.87) 0.93 (2.24) 0.015 0.003
Duration of pain 19.38 (16.35) 19.06 (22.73) 14.7 (18.36) 21.36 (25.59) 4.59 (10.55) -2.30 (18.24) 0.017 0.016
  1. a Derived from t-test.
  2. b Derived from ANCOVA adjusted for baseline.