Condition category
Signs and Symptoms
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Background and study aims
Studies on telemedicine suggest that it safely enables cost savings and improves right-siting of patients with diverse illnesses. These reports have fueled a rise in the adoption of these applications in various clinical settings, allowing new models for de-centralized care to alleviate shortages in tertiary hospital resources. The use of telehealth modalities by patients directly for follow-up review of acute ailments has not been definitively examined for clinical effectiveness, particularly in patients with gastrointestinal diseases. The aim of this study is to evaluate the efficacy and safety of digital telereview as a “pull-from-patient” form of service delivery innovation in comparison with existing telephone-based telereview as a “push-to-patient” form of service delivery. This is the first head-to-head comparison of these alternative forms of service delivery for the follow-up of patients with acute abdominal pain.

Who can participate?
Patients with acute abdominal pain admitted to and discharged from the ED observation ward of a tertiary hospital in Singapore

What does the study involve?
Participants are randomly allocated to the intervention group or the control group. The control group receive scheduled telephone-based telereview with missed reviews actively coordinated and rescheduled by ED staff three times. Participants in the intervention group have access to an integrated platform for digital telereview, patient-led appointment rescheduling, and automated patient/provider notifications. Service utilisation is measured in terms of patient usage of the follow-up telereview service at 48-72 hours (whether telephone-based or digital telereview).

What are the possible benefits and risks of participating?
Possible benefits include early detection in the event of any persistent illness during follow-up assessment. It may help address anxiety so patients would be less likely to return to the ED for advice regarding the same medical problem, since they will be able to consult the healthcare worker on-duty from the comfort of their home during telereview. Participants will contribute to medical knowledge about digital consultations. Possible risks include patients missing the follow-up telereview, which occurs in the context of existing practices in the emergency department. Existing practices for missed telereviews are that they are actively and manually rescheduled by ED staff on-duty by phone call for three attempts within the 48 to 72-hour telereview window following discharge. No further attempt is made to contact patients who are not contactable in 72 hours or who decline telereview. There is a potential breach of confidentiality during review of medical records. The study has the added precaution of medical record review only being conducted by staff in the institution who do not have any conflict of interest. No patient medical information is stored on the digital consultation platform, and is instead entered directly into hospital electronic medical record by the attending healthcare worker. There may be inconveniences in connecting to the internet to access the platform and survey, and risks that are currently unforeseeable.

Where is the study run from?
Singapore General Hospital (Singapore)

When is the study starting and how long is it expected to run for?
February 2017 to December 2018

Who is funding the study?
Investigator initiated and funded

Who is the main contact?
Prof. R Ponampalam

Trial website

Contact information



Primary contact

Prof R Ponampalam


Contact details

Department of Emergency Medicine
Singapore General Hospital (SGH)
1 Hospital Drive
+65 (0)63213497



Additional contact

Dr Dinesh Gunasekeran


Contact details

Singapore General Hospital (SGH)
1 Hospital Drive

Additional identifiers

EudraCT number

Nil known number

Nil known

Protocol/serial number

CIRB Ref no: 2017/2049

Study information

Scientific title

Pilot prospective randomized controlled trial to assess feasibility of teleconsultation for the follow-up of patients with undifferentiated abdominal pain following discharge from Singapore General Hospital using the DoctorBell platform



Study hypothesis

The study hypotheses are that the use of a digital platform is safe and effective for follow-up of patients with abdominal pain.

Ethics approval

Approved 20/02/2017, centralized Institutional Review Board (CIRB) of the Singapore General Hospital (SGH), (31 Hospital Avenue, #0303, Boyer Block C, S168753, Singapore; Tel: +65 (0)62250488; Email:, Singhealth CIRB protocol number: 2017/2049

Study design

Single-centre prospective parallel-group randomised-controlled trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use contact details to request a participant information sheet.


Acute abdominal pain


Study population were patients with acute abdominal pain admitted to the ED observation ward (EOW) of a tertiary hospital in Singapore. Patients were considered for recruitment in this study at the point of discharge from the EOW when study team members were on duty, after the patients had received routine management and disposition plans. This includes counselling for self-efficacy and monitoring at home, as well as advice regarding clinical features and red flags that warrant telereview and/or re-presentation to the ED.

After completion of informed consent, simple randomisation was conducted by a study team member drawing lots from a study box for allocation concealment. The lots in the study box were equal numbers of sheets of paper replenished after each draw, indicating either control (c) or intervention (i) study arm, that were maintained by a study team member SY not involved in clinical care and the implementation of the randomisation. Study team members recruiting patients provided participants with links to web-based surveys about symptoms at initial presentation and follow-up, to be reported by patients directly following recruitment and following telereview, respectively.

Follow-up telereview is routinely conducted in this population by the ED staff on-duty. This is done to facilitate early right siting of these patients through prompt identification of deteriorating patients as well as to encourage self-efficacy in anxious-well patients that do not require re-presentation. In this study, patients in the control arm received routine scheduled telephone-based telereview within 48-72 hours following discharge from the EOW. Telereview was then conducted by the ED staff on-shift at the time of the patient’s booked appointment, with communication subsequently documented in the patient’s electronic medical record. Any missed telereviews were actively and manually rescheduled by ED staff on-duty by phone call for three attempts within the 48 to 72-hour window following discharge. No further attempt was made to contact patients who were not contactable in 72 hours or declined telereview.

Patients in the intervention arm instead had access to the novel telehealth platform, DoctorBell. This web-based platform allowed patient-led booking of one digital telereview along with rescheduling or cancellation based on their individual availability, within a restricted 48 to 72-hour window following discharge from the ED. Digital telereviews through this platform were patient-led, and were not actively followed-up to be rescheduled by ED staff. Additionally, the ED staff on-duty was able to view the bookings rostered during their shift when they started work, and received automated real-time notifications of any changes made to appointment bookings by patients in the digital platform. Before the telereview appointment, patients first received an in-application form that allowed them to start reporting key history or symptoms that they had. This information was then available to the ED staff on-duty before they began the web-based teleconsultation with the patient, giving staff an opportunity to clarify uncertainties with the ED consultant on-duty before beginning teleconsultation with the patient.

Initially service utilisation and safety were the only outcome measures studied. However, study team members observed that while they needed to instruct some patients to re-present during telereview, not all patients complied with these instructions. Therefore, efficacy in terms of patient compliance to final disposition plan was added as an outcome measure for analysis after trial initiation, using existing available data collected during the study and with no change to study procedures.

Intervention type



Drug names

Primary outcome measure

Service utilisation measured in terms of patient usage of follow-up telereview service at 48-72 hours (whether telephone-based or digital telereview)

Secondary outcome measures

1. Safety measured in terms of re-presentation to the emergency department within 72 hours and within 2 weeks
2. Efficacy measured in terms of patient compliance to the final disposition plan. For patients who did not receive telereview, final disposition plan was that given at the point of discharge from the ED i.e. self-management and monitoring at home (that was accompanied by routine education regarding red flags that should prompt telereview and/or re-presentation). For patients who received telereview, final disposition plan was that given after telereview i.e. whether to continue self-management at home or re-present at the ED. Measured at 2 weeks.

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Patients with acute abdominal pain admitted to the ED observation ward (EOW) of a tertiary hospital in Singapore
2. Ability to read in English and operate messaging telephone applications such as WhatsApp

Participant type


Age group




Target number of participants


Total final enrolment


Participant exclusion criteria

1. Below 21 years of age
2. Pregnant
3. Prisoners
4. Cognitively impaired

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

Singapore General Hospital
1 Hospital Drive

Sponsor information


Singapore General Hospital

Sponsor details

1 Hospital Drive
+65 (0)63213497

Sponsor type

Hospital/treatment centre



Funder type


Funder name

Investigator initiated and funded

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Publication in a peer-reviewed journal and dissemination through research presentations at scientific conferences.

IPD sharing statement
This data is not made available due to a lack of participant consent for data sharing and will be held by the Singapore General Hospital in accordance with Singapore law.

Intention to publish date


Participant level data

Not expected to be available

Basic results (scientific)

Publication list

2020 results in (added 28/05/2020)

Publication citations

Additional files

Editorial Notes

28/05/2020: Publication reference added. 12/12/2019: A scientific contact was added. 11/12/2019: The following changes have been made: 1. The intention to publish date has been changed from 01/07/2019 to 30/06/2020. 2. The total final enrolment number has been added. 18/06/2019: Trial's existence confirmed by institutional review board.