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Table 1 Sample size calculations assuming 20% in the control arm will have a positive NAAT for oropharyngeal gonorrhoea within 12 weeks

From: A multicentre double-blind randomised controlled trial evaluating the efficacy of daily use of antibacterial mouthwash against oropharyngeal gonorrhoea among men who have sex with men: the OMEGA (Oral Mouthwash use to Eradicate GonorrhoeA) study protocol

Efficacy of mouthwash Oropharyngeal gonorrhoea positivity in the intervention arm Number of participants
80% Power 90% Power
50% reduction 10% 438 572
55% reduction 9% 356 464
60% reduction 8% 294 380
  1. Calculations were based on 5% significance level