Final answer:
The ACSM risk factor for diabetes in a 2-hour oral glucose tolerance test is a blood glucose level of ≥ 200 mg/dL, indicating a potential diabetes mellitus diagnosis.
Step-by-step explanation:
The ACSM risk factor for diabetes in a 2-hour oral glucose tolerance test (OGTT) is a blood glucose level of ≥ 200 mg/dL. A glucose level reaching or exceeding this value suggests that a person may have diabetes mellitus. Comparatively, a normal response to the OGTT would show blood glucose levels typically peaking below 140 mg/dL after the intake of glucose and returning to normal levels within approximately 2.5 hours. In contrast, individuals with diabetes mellitus demonstrate impaired glucose tolerance. In these cases, a significant elevation in blood glucose is observed that does not return to normal even after 2.5 hours. It is important to note that a fasting glucose level between 100 and 125 mg/dL is indicative of pre-diabetes, while a level higher than 125 mg/dL can diagnose diabetes when not considering an OGTT.