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Table 4 Adverse events reported by >5% of participants in at least one study arm

From: Is a combination of varenicline and nicotine patch more effective in helping smokers quit than varenicline alone? A randomised controlled trial

AE reported Number of participants experiencing the problem Pearson Chi-square; p value
  Placebo patch N=59 Nicotine patch N=58  
Abnormal dreams 5 12 x 2 =3.5; p = 0.06
Headache 4 6 x 2 =.48; p = 0.49
Insomnia 11 11 x 2 =.00; p = 0.97
Nausea 26 33 x 2 =1.93; p = 0.17