A new medication ‘sweetsleep’ is introduced into the market to prevent insomnia in a population at high risk for insomnia. Out of 1890 individuals who took ‘sweetsleep’, 410 individuals were diagnosed with insomnia a year later. Out of 7160 individuals who did not take ‘sweetsleep’ medication, 2520 individuals developed insomnia a year later. What is the number needed to treat (NNT) for this ‘sweetsleep’ medication?
