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Table 2 Sample size estimates based on reduction in repeat positivity rate from 30% to 15%

From: A randomised trial of point-of-care tests for chlamydia and gonorrhoea infections in remote Aboriginal communities: Test, Treat ANd GO- the “TTANGO” trial protocol

Coefficient of variation Number of services
  80% power 90% power
25% 8 10
30% 10 14