Cancer data from Chatham County were reviewed by the Georgia Cancer Registry to determine the incidence rate of ovarian cancer in 2021 in the county. Women residing in Chatham County are the:

The appropriate reasoning for choosing that women residing in Chatham County are the population at risk stems from the definition of this term in the context of epidemiology and cancer statistics. The population at risk refers to the group of individuals who are susceptible to developing a particular condition or disease, in this case, ovarian cancer.

In this instance, the women living in Chatham County constitute the relevant demographic for assessing the incidence rate of ovarian cancer. By focusing on this specific group, the Georgia Cancer Registry can accurately analyze how many women within this population have been diagnosed with ovarian cancer, thereby providing a clear understanding of the cancer's impact in that geographic area during the specified year.

Identifying this group as the population at risk is critical for accurately estimating incidence rates, as it allows for comparisons against stable population figures and aids in public health planning and resource allocation.