NCT04121949

Cost-effectiveness and Safety of the CADScorSystem in Patients With Symptoms Suggestive of Stable Coronary Artery Disease.

A Prospective, Randomized, Controlled, Parallel-group, Multicentre Trial to Examine the Cost-effectiveness and Safety of Adding the CADScorSystem as a Rule-out Test in Patients Referred With Symptoms Suggestive of Stable Coronary Artery Disease.

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 2,016 (actual)
• Sponsor: Bispebjerg Hospital · Academic / Other
• Sex: All
• Age: 30 Years
• Healthy volunteers: Not accepted

Summary

This study evaluates the addition of the CADScorSystem to a standard Diamond-Forrester score guided rule-out strategy in ambulatory patients referred with symptoms suggestive of stable coronary artery disease. Half of the patients will undergo stratification using a Diamond-Forrester score only, while the other half will undergo stratification using a Diamond-Forrester score and a CAD-score. The study hypothesis is that the addition of a CAD-score will reduce unnecessary testing without compromising patient safety.

Detailed description

Purpose and Rationale for the Study: The declining incidence of obstructive CAD and a good prognosis for patients with stable angina challenges the resource demanding approach recommended in current guidelines. The CADScor®System may be an efficient, fast and low-cost diagnostic tool with a high rule-out efficiency. The current study aims to investigate if the CADScor®System can be added as a rule-out test in patients referred with suspected stable CAD to reduce unnecessary testing Study Hypothesis: A Diamond-Forrester score plus CAD-score guided rule-out strategy is superior to a Diamond-Forrester score guided strategy alone in reducing diagnostic procedures and non-inferior in terms of safety outcomes in patients with symptoms suggestive of stable coronary artery disease. Study Setting: This study will enrol patients without known CAD who are referred with symptoms suggestive for stable CAD for outpatient evaluation at the participating sites. All patients will be symptomatic and require evaluation for suspected CAD. Thus, whether or not the patient chooses to participate in the study, the patient will undergo evaluation for suspected CAD. All the standard NIT modalities and ICA in the study are clinically well established and performed routinely and safely. Experimental testing involves the CADScor®System, for ruling out CAD before any NIT in the intervention group. End of Study: The study will end when all the following have occurred: (1) at least 2000 patients have been randomized, and (2) 12±1 months (1 year) have elapsed since the last patient was randomized. Extended Follow-up after Study Termination: Follow-up might be performed for up to 10 years after randomization. Follow-up information will be extracted from national registers, including information on cardiovascular events and treatments, hospitalizations and ambulatory visits due to cardiovascular events, and causes of death. Statistical methods: A detailed description of the planned statistical analyses will be documented in a separate statistical report and analysis plan (SAP), which will be completed before data base lock. Sample size considerations: A reduction of 15% or more in the primary endpoint is regarded as clinically significant. Assuming an alpha significance level of 0.05, a statistical power of 80% and an expected number of NIT/ICA of 0.94 per patient in the standard care group, a sample size of 314 patients in each arm is needed to ascertain superiority of the intervention. A sample size of 1914 provides 90% power for testing non-inferiority in terms of MACE between the two testing strategies, at an alpha significance level of 0.05. We choose to include 2000 patients, i.e. 1000 patients in each group, allowing for a 4% loss to follow-up and drop out and providing power for the primary endpoint and the secondary MACE non-inferiority endpoint. Statistical analysis: The full analysis set (FAS) will include all randomized patients in whom written informed consent was obtained and in accordance with the intention-to-treat principle all patients will be analysed according to the allocated treatment group. The per-protocol set (PPS) will include only those patients from the FAS who did not have one of the following major protocol violations: inclusion criteria not met, exclusion criteria met, no DF-score calculation, or no CAD-score measurement (intervention group only). Patients who did not receive the randomly allocated CAD-score measurement will be included and analysed in the control group (per protocol analysis).

Conditions

• Angina, Stable

Interventions

Type	Name	Description
DEVICE	CADScor®System	The CADScor®System is a low cost, low resource-demanding, non-invasive, radiation-free device using highly advanced analysis of sounds originating from blood flow turbulence in the coronary circulation and myocardial motion. Heart sound recordings are obtained transcutaneously during a 3 minutes recording period with a microphone mounted at the IC4. A CAD-score on a scale from 0 to 99 is estimated immediately after the recording with a fully automated algorithm. The algorithm measures eight acoustic properties and the resulting acoustic score is combined with the clinical risk factors gender, age, and hypertension. The entire procedure lasts approximately 10 minutes.

Timeline

• Start date: 2019-07-01
• Primary completion: 2023-09-15
• Completion: 2023-09-15
• First posted: 2019-10-10
• Last updated: 2023-10-05

Locations

6 sites across 2 countries: Denmark, Sweden