Hospital vs. Cell Phone Number Follow-Up Randomization Study

Study Overview
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Brief Summary
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This study is being conducted to evaluate the hypothesis that study subjects will be more responsive to follow-up phone calls made from personal cell phone numbers than from hospital landline numbers. To evaluate this, study subjects previously enrolled in a cardiac biomarker study (the Early Identification of Acute Coronary Syndrome study) were randomized to receive their follow-up phone calls (the calls associated with the Early ID study occur at 30 days and 1 year after initial enrollment) from either a hospital office landline or from the personal cell phones of the research assistants making these calls. This was done as a 1:1 randomization. The number of call attempts required to reach the study subjects were recorded as the calls were made and the date of successful follow-up was recorded once contact was made.

Official Title
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Study Subject Responsiveness to Follow-Up Phone Calls From a Hospital Landline as Compared With From a Private Cellular Phone Number

Conditions
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Subject Follow-up

Intervention / Treatment
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* Other: Hospital Landline Phone Calls
* Other: Private Cell Phone Calls


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Enrollment in the Early Identification of Acute Coronary Syndrome study Working telephone numbers Exclusion Criteria: None

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Hospital Landline<br>Subjects in this arm have all of their follow-up phone calls placed from a hospital landline number. | Other: Hospital Landline Phone Calls<br>* Follow-up phone calls are made from the hospital landline phones in a research office<br>|
| Active Comparator: Private Cell Phone<br>Subjects in this arm have all of their follow-up phone calls placed from a private cell phone number. | Other: Private Cell Phone Calls<br>* Follow-up phone calls are made from the private cell phones of research assistants<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Successful phone call contact at 30 days | Contact is attempted from 30 days after enrollment through 90 days after enrollment. If contact is made during this time frame, 30 day follow-up is considered to have been successful. | 90 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The number of call attempts required to obtain successful follow-up | Contact is attempted from 30 days after enrollment through 90 days after enrollment. The number of calls required to make successful contact in this time frame are recorded. | 90 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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follow up, cell phone, hospital landline