Sample size
Sample size calculation was performed using the following formula: n = P × (100 - P) × z2/d2. Where P is the anticipated awareness score percent, d is the desired precision, z is the appropriate value from the normal distribution for the desired confidence interval. Using 95% confidence levels, 5% precision level and an anticipated 50% proportion of participants receiving an appropriate score (this conservative value results in the highest possible sample size that can be used in this study, as no previous studies in this area where found to indicate level of awareness), a sample size of 385 was required.