Final answer:
The relative risk of contracting TB in alcoholics is calculated by comparing the incidence of TB in alcoholics to that in the general population, with an expected higher risk in alcoholics.
Step-by-step explanation:
The relative risk (RR) of contracting tuberculosis (TB) in alcoholics compared to the general population can be calculated by dividing the incidence of TB in the group of alcoholics (exposed group) by the incidence in the general population (non-exposed group).
Alcoholism is considered a risk factor for TB, and therefore, the relative risk is expected to be higher in alcoholics. This higher risk is due to factors associated with alcoholism such as weakened immune systems, poor nutrition, and reduced health care utilization, which can increase vulnerability to infections like TB.