Which of the following does NOT help determine group health insurance premiums?

In the context of determining group health insurance premiums, the income level of group members is not a relevant factor. Premiums for group health insurance are primarily influenced by factors that assess the overall risk and cost associated with the group as a whole rather than the individual financial circumstances of its members.

Factors like the average age of the group are significant because older groups typically represent a higher risk and may incur more healthcare costs, thus impacting premiums. Claims experience provides insight into past healthcare usage within the group, allowing insurers to predict future costs, which directly influences premium calculations. The size of the group is also critical; larger groups generally benefit from more stable risk assessments and may enjoy lower per-person premiums due to the law of large numbers.

In contrast, income level does not directly affect the underwriting process or risk assessment for group insurance. Premiums are calculated more on the basis of health-related criteria rather than economic factors, making income a non-determinative factor in this context.