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

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

Efficacy of mouthwash	Oropharyngeal gonorrhoea positivity in the intervention arm	Number of participants
Efficacy of mouthwash	Oropharyngeal gonorrhoea positivity in the intervention arm	80% Power	90% Power
50% reduction	10%	438	572
55% reduction	9%	356	464
60% reduction	8%	294	380

ISSN: 1471-2334