Thus, at the treatment threshold p × B = (1 − p) × R Solving for p, this equation reduces to p = R / (B + R) From this equation, it is apparent that if B (benefit) and R (risk) are the same, the treatment threshold becomes 1 / (1 + 1) = 0.5, which means that when the probability of disease is > 50%, clinicians would treat, and when probability is < 50%, clinicians would not treat.