LinkUP: COVID-19 Intervention for Underserved Populations
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ClinicalTrials.gov Identifier: NCT05181657 |
Recruitment Status :
Active, not recruiting
First Posted : January 6, 2022
Last Update Posted : June 8, 2022
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Motivational Interviewing | Behavioral: COVID-19 education | Not Applicable |
Together with our community partner, the Harm Reduction Coalition of San Diego's (HRCSD) OnPoint, a mobile safe syringe program (SSP), we will evaluate develop and evaluate an intervention to improve uptake of COVID-19 testing and vaccination. Our Study Aims are :
- To adapt an existing behavioral intervention incorporating motivational interviewing (MI) to improve uptake of HIV pre-exposure prophylaxis among people who inject drugs (PWID), by replacing the educational content with information intended to improve uptake of COVID19 testing and COVID19 vaccination.
- To pilot test the intervention in Aim 1 (called LinkUP) at OnPoint's 4 mobile SSP locations across San Diego County. We expect that the LinkUP intervention will be acceptable to PWID and considered feasible and sustainable by OnPoint staff and the project's Community Scientific Advisory Board (CSAB).
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 150 participants |
Allocation: | Randomized |
Intervention Model: | Crossover Assignment |
Intervention Model Description: | The four OnPoint syringe exchange locations will be randomized to deliver either the active (intervention) or didactic (control) version of the LinkUP intervention. The randomization scheme will be developed using an algorithm by La Frontera's statistician. Half way into enrollment, there will be a one-week 'washout' period, after which time the two original intervention syringe exchange sites will become control sites and the two original control sites will become intervention sites. This cluster randomization scheme will help ensure that no neighborhood in San Diego County is denied access to the LinkUP intervention. By the end of the study, 75 LinkUP participants will have been randomized to an intervention site and 75 will have been randomized to a control site. |
Masking: | Double (Participant, Investigator) |
Masking Description: | Neither study participants or principal investigator will know which group participants have been assigned to. |
Primary Purpose: | Prevention |
Official Title: | LinkUP: COVID-19 Intervention for Underserved Populations Participating in Parent Study Proyecto La Frontera |
Actual Study Start Date : | March 15, 2022 |
Actual Primary Completion Date : | June 2, 2022 |
Estimated Study Completion Date : | August 30, 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: LinkUP Active intervention
The counselor will present basic evidence-based COVID-19 information on SARS-CoV-2 biology and epidemiology, testing and the safety and efficacy of available COVID-19 vaccines. The counselor will also address COVID-19 misinformation (e.g., that COVID is no worse than the flu), and COVID-19 disinformation (e.g., that COVID vaccines include a tracking device). The LinkUP active intervention combines education, motivational interviewing (MI), problem-solving, and ongoing support from peer counselors. Through an open discussion with one of OnPoint's peer counselors who are trained in MI, the counselor will present evidence-based COVID-19 information. Next, the counselor will attempt to identify the participant's concerns about COVID-19 and vaccination in an attempt to tip their decisional balance. |
Behavioral: COVID-19 education
This session will be completed within 45 minutes. The LinkUP intervention will be available in English and Spanish. |
Placebo Comparator: LinkUP Control Condition (didactic intervention)
As described above, the control condition is a one-way sharing of COVID-19 information presented by an OnPoint counselor. The counselor will be instructed to answer any questions the participant may have but will not engage in motivational interviewing counseling. The same educational materials used in the LinkUP intervention module will be used for this session and it will be completed within 45 minutes.
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Behavioral: COVID-19 education
This session will be completed within 45 minutes. The LinkUP intervention will be available in English and Spanish. |
- COVID-19 Testing [ Time Frame: 6 months ]had a COVID test within 6 months of the intervention
- COVID-19 Vaccination [ Time Frame: 6 months ]had ≥ one COVID shot within 6 months of intervention,

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria
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Enrolled in La Frontera,
AND
-
Report NOT having been voluntarily tested for COVID-19 outside of La Frontera or report having had a mandatory COVID-19 test more than 2 months ago
AND
-
a) Never vaccinated OR b) Received 1 shot of the Moderna vaccine (>=1 month ago) OR c) received 1 shot of the Pfizer vaccine (>=3 weeks ago) OR d) received 1 shot of the Jenssen vaccine (>=2 months ago) OR e) received 2 shots of the Moderna OR Pfizer vaccine (last shot >=5 months ago) OR f) received 1 shot of another vaccine (>=1 month ago) OR g) received 2 shots of another vaccine (last shot >=5 months ago). NOTE: participants who indicate that they were vaccinated but don't remember what vaccine they received would fall under the f category if they only received one shot and under the g category if they received 2 shots.
OR
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Enrolled in La Frontera AND report TWO or more of the following symptoms: a) new loss of smell or taste, b) cough, c) sore throat/congestion/runny nose, d) skin rash within the last week without having tested positive for COVID within the last month.
OR
- Enrolled in La Frontera AND report having EITHER fever/chills OR shortness of breath within the last week without having tested positive for COVID within the last month.
Exclusion Criteria
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Not enrolled in La Frontera,
AND
-
Report having been voluntarily tested for COVID-19 outside of La Frontera or report having had a mandatory COVID-19 test less than 2 months ago
AND
-
a) Be vaccinated OR b) Received 1 shot of the Moderna vaccine (<1 month ago) OR c) received 1 shot of the Pfizer vaccine (<3 weeks ago) OR d) received 1 shot of the Jenssen vaccine (<2 months ago) OR e) received 2 shots of the Moderna OR Pfizer vaccine (last shot <5 months ago) OR f) received 1 shot of another vaccine (<1 month ago) OR g) received 2 shots of another vaccine (last shot <5 months ago). NOTE: participants who indicate that they were vaccinated but don't remember what vaccine they received would fall under the f category if they only received one shot and under the g category if they received 2 shots.
OR
-
Not enrolled in La Frontera AND do NOT report TWO or more of the following symptoms: a) new loss of smell or taste, b) cough, c) sore throat/congestion/runny nose, d) skin rash within the last week without having tested positive for COVID within the last month.
OR
- Not enrolled in La Frontera AND do NOT report having EITHER fever/chills OR shortness of breath within the last week without having tested positive for COVID within the last month.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05181657
United States, California | |
La Frontera Project | |
San Diego, California, United States, 92103 |
Principal Investigator: | Steffanie Strathdee, PhD | University of California, San Diego |
Responsible Party: | Steffanie Strathdee, Distinguished Professor and Harold Simon Chair, Associate Dean of Global Health Sciences, Division of Infectious Disease and Global Public Health, UCSD Department of Medicine, University of California, San Diego |
ClinicalTrials.gov Identifier: | NCT05181657 |
Other Study ID Numbers: |
LinkUP R01DA049644 ( U.S. NIH Grant/Contract ) |
First Posted: | January 6, 2022 Key Record Dates |
Last Update Posted: | June 8, 2022 |
Last Verified: | June 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Behavior change |