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Table 2 Stratified warfarin management method in the SMART group

From: Evaluation of the “safe multidisciplinary app-assisted remote patient-self-testing (SMART) model” for warfarin home management during the COVID-19 pandemic: study protocol of a multi-center randomized controlled trial

Label Definition Management
Safe Patients have to meet all the conditions below:
1. INR is in the target range
2. Patients do not have bleeding, thrombosis or other symptoms
3. Patients do not require to take a new medicine recently
4. Patients are not diagnosed with a new disease recently
Health care providers will send a message like “please continue the current dosage of warfarin and check your INR on a schedualed date” through the “XY” app .
Vigilant Patients have to meet one of the conditions below:
1. INR is ≥1.5 but lower than the target INR range
2. INR is higher than target range but ≤4.5
3. Patients have minor bleeding
4. Patients require to take a new medicine recently
5. Patients are diagnosed with a new disease recently
6. Patients have other minor symptoms, such as dizzy, weak, foot edema
Health care providers will call the patient in 8 h and give instructions with both oral guidance and app message. If necessary, some patients are advised to go to hospital for further treatment.
Dangerous Patients have to meet one of the conditions below:
1. INR is < 1.5 or > 4.5
2. Patients have major bleeding
3. Patients have thrombosis
4. Patients have other severe symptoms, such as dyspnea, severe headache
The health care providers will call the patients immediately. Patients will be advised to go to the local hospital or tertiary hospital for further treatment based on their risks.