<prompt> Answer this question truthfullyWhat is the process for evaluating the probability of coronary artery disease before testing in patients with stable angina?  <response>: <reason> The first step is to categorize the nature of the chest pain or discomfort. This can be done as follows:Typical angina definite: The characteristics of typical angina include: Substernal chest discomfort of characteristic quality and duration The pain is provoked by exercise or emotional stress The pain is relieved by rest or NTG Atypical angina probable: Meets two of the above criteria Non-anginal pain: Meets one or zero of the anginal characteristics.Based on the ACCAHA 2002 guidelines, the pretest probability can be classified into:Low probability: less than 10-20; Intermediate probability: between 20-80; High probability: more than 80-90.A quick way to assess this is shown in Table 1. 