What index is used to characterize the risk of non-carcinogenic substances?

The Hazard Index is used to characterize the risk of non-carcinogenic substances. It quantitatively evaluates potential health risks associated with exposure to multiple non-carcinogenic agents. The index is calculated by summing the ratios of the estimated exposure level to reference doses for individual substances. A Hazard Index greater than 1 indicates that the combined exposures may pose a significant health risk, whereas a Hazard Index below 1 suggests that the level of exposure is considered safe.

Other indices mentioned, such as the Risk Index, Toxicity Index, and Exposure Index, do not specifically define non-carcinogenic risk in the same way. The Risk Index typically pertains to a broader assessment including both carcinogenic and non-carcinogenic risks. The Toxicity Index generally relates to evaluating the toxicity of various substances but does not specifically focus on risk assessments. The Exposure Index may relate to measuring or ranking exposure levels but does not encompass health risk evaluations like the Hazard Index does. Thus, the Hazard Index is clearly the most appropriate choice for assessing the risk associated with non-carcinogenic substances.