SAFER Wearables Study: A Study of the Acceptability and Performance of Wearables for Atrial Fibrillation Screening in Older Adults
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 130
- 试验地点
- 1
- 主要终点
- The performance of each wrist-worn wearable approach for identifying AF participants
研究概览
简要总结
--- Background and study aim
Atrial fibrillation (AF) is an irregular heart rhythm which causes a five-fold increase in the risk of stroke. Approximately one in ten people aged over 70 have AF. If AF is recognised then the risk of stroke can be reduced by taking tablets regularly. AF can be difficult to recognise as it can occur without symptoms and only intermittently. Consequently, AF is not recognised in many people, meaning they live with an increased risk of stroke. Therefore, it is important to find ways to identify AF more reliably.
Recently, wearable devices have been developed which could be useful for identifying AF. Several devices can monitor heart activity in daily life, including wristbands, smart watches and chest patch monitors. The aim of this study is to assess the acceptability and performance of wearables for use in AF screening in older adults.
The primary objective is to determine the feasibility of measuring inter-beat-intervals using a wristband. The secondary objectives are:
(i) to determine the acceptability of wearables; (ii) to determine the acceptability of the screening approach; (iii) to assess the performance of wearables for acquiring signals; (iv) to assess the performance of signal processing algorithms; and (v) to assess the performance of wearables for AF screening.
--- Who can participate?
Selected people who have previously participated in the SAFER Programme can participate in this study. The Investigators will invite previous SAFER Programme participants to also participate in this study, aiming to enrol 65 without AF, and 65 with AF.
--- What does the study involve?
Participants will be asked to wear three devices for seven days: Two wristbands (like watches), and one chest patch (like a plaster). These devices will collect measurements of their heart's activity. The Investigators will also ask participants to tell them how they found wearing the devices by completing a questionnaire. The Investigators will compare how participants found wearing each device, and how accurately each device identifies AF.
--- What are the possible benefits and risks of participating?
There will be no direct benefit to participants, although this research is intended to benefit future patients like them. Some participants may experience irritation or redness whilst wearing a chest patch - participants will be advised that if this occurs then they should remove it straightaway.
详细描述
--- Where is the study run from?
The University of Cambridge.
--- Study procedures
Participants will be asked to:
- Consent: Participants will be asked to confirm their consent to take part by posting the enclosed consent form to the Investigators in a prepaid envelope.
- Device delivery: The Investigators will send participants the devices, a detailed instruction leaflet, and a questionnaire.
- Training: The Investigators will explain to participants how to wear and use the devices over the telephone, referring to the instruction leaflet.
- Wear the devices: Participants will be asked to wear the devices for seven days, going about their daily life as normal. The devices are waterproof. If a participant has chest hair then they will need to shave a small area for the chest-patch to stick to. The Investigators will ask participants to use the watch four times each day to record heart activity for 30 seconds. Participants will be asked to plug in a small hub which will send information from the devices. The Investigators will telephone participants during the study to check for any problems.
- Questionnaire: Participants will be asked to complete a questionnaire on the devices after wearing them.
- Return devices: At the end, the Investigators will telephone participants and arrange a courier to pick up the devices and questionnaire from their home (which the Investigators will arrange and pay for).
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 65 Years 至 —（Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •AF screening successfully completed during the SAFER Programme
- •Aged 65 years or over
- •Lives in private accommodation
- •Willing and able to give informed consent
排除标准
- •Regularly sleeps on front
- •Has a chest wound
- •Previous reaction to, or known allergy to ECG electrodes or silicone
- •Receiving palliative care
结局指标
主要结局
The performance of each wrist-worn wearable approach for identifying AF participants
时间窗: 7 days
Sensitivity and specificity
次要结局
- The time for which each device attempts to record signals(7 days)
- The time for which wearable signals are acquired(7 days)
- The agreement between ECG features derived from wrist-ECGs and reference ECG chest-patch signals.(7 days)
- The proportion of possible AF episodes detected from IBI wristband signals for which the reference ECG exhibited a verified AF episode lasting for ≥ 90 seconds from the start time of the possible episode(7 days)
- The agreement between AF burden estimates obtained from wrist devices and the reference ECG chest-patch(7 days)
- The number of wrist-ECG recordings taken by participants(7 days)
- The time for which participants report wearing the wearables(7 days)
- The proportion of participants in whom AF was observed, who recorded a wrist-ECG signal during an AF episode(7 days)
- Participant-reported experiences of wearing the wearables(Day 8)
- Device packs lost in transit(Day 1, end of participation)
- The performance of an algorithm to detect AF from wrist-ECG signals(7 days)
- The performance of an algorithm to detect possible AF from IBI wristband signals(7 days)
- The proportion of recording time for which wearable signals are of high quality(7 days)
- The proportion of recording time for which high quality wearable signals are acquired at different times of day(7 days)
- The agreement between interbeat-intervals (IBIs) provided by IBI wristbands, and derived from reference ECG chest-patch signals(7 days)
研究者
Peter Charlton
British Heart Foundation Research Fellow
University of Cambridge