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CompletedNCT03224858SUMMITUpdated Mar 21, 2025

Ambulatory ICU Study for Medically and Socially Complex Patients

An interventional study of SUMMIT intervention and Enhanced usual care in Health Services, Comorbidity and Primary Health Care, sponsored by Oregon Health and Science University. Completed at 1 site in United States. Open to participants aged 18 Years to 99 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-03-21.

Sponsored by Oregon Health and Science University · Not applicable, Interventional, and Health services research

From the registry’s dates

  • Registered 9 months after the study started (first participant enrolled Sep 2016, registered Jun 2017).
Phase
Not applicable
Study type
Interventional
Enrollment
200
Allocation
Randomized
Ages
18 Years to 99 Years
Sex
All
01

Study summary

This is a prospective randomized wait-list control study to determine whether a stand-alone, co-located team of physician, mental health behaviorist, and care coordinators with decreased panel size (aka "intensive primary care") will reduce inpatient and emergency care utilization, inpatient costs of care, and improve patient activation and experience for medically and socially complex patients, compared to enhanced usual care at 6 and 12 months. Participants with multiple co-morbidities, and meet utilization criteria will have the opportunity to enroll; half the participants will start the intervention immediately, while half will continue enhanced usual care for 6 months before beginning the intervention.

Read the detailed description

The goal of this study is to conduct an evaluation of an "Ambulatory-ICU" model of primary care for "high utilizer" patients with medical, behavioral, and social complexity. A small proportion of patients use > 50 % of healthcare resources. It is currently unknown what interventions can help reduce inappropriate utilization due to lack of studies with rigorous study design, particularly in patients with high rates of homelessness, mental illness and substance use. The use of high-risk teams for select patients is a promising model of primary care that removes barriers to accessing usual care services by centralizing medical and behavioral clinical services, promotes ability to outreach beyond the clinic, and promote continuity of care and trust-building between patient and provider teams.

This study will test the hypothesis that a stand-alone clinic based intervention of a multidisciplinary, co-located physician, mental health behaviorist, nursing, pharmacist, and care coordinators with reduced panel size, and focus on patient capacity building and decreasing treatment burden will improve health outcomes at 6 and 12 months in a low-income high utilizer population with history of homelessness.

Enhanced usual care comprises of care delivered at Old Town Clinic (OTC) a Federally Qualified Health Center (FQHC) that is modeled on the Patient Centered Medical Home (PCMH) model. Patients have a designated primary care physician and care team with access to chronic disease education, mental health, social work, and substance abuse programs through referral system. In addition, participants thought to have difficulty engaging in primary care have access to a Health Resilience Specialist, a community health worker intervention who conducts outreach and assists the patient in care navigation.

02

Conditions studied

  • Health Services
  • Comorbidity
  • Primary Health Care

Keywords

  • Patient-Centered Care
  • Comorbidity
03

In context

Lead sponsor

Oregon Health and Science University is the lead sponsor of 676 studies on the registry; 136 are open to participants now.

Of its 49 completed or terminated interventional studies of FDA-regulated products, 36 (73%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 99 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • One or more of the following medical diagnoses:
  • congestive heart failure
  • uncontrolled diabetes
  • end stage liver disease
  • chronic kidney disease (stage III or higher)
  • chronic obstructive pulmonary disease (group C or D)
  • chronic or severe soft tissue infections or ulcers
  • osteomyelitis
  • failure to thrive

And/OR:

  • One or more of the following behavioral health diagnoses:
  • psychotic disorder
  • mood disorder
  • post-traumatic stress disorder
  • active substance use disorder

And/OR

  • One or more of the following utilization patterns:
  • 1+ medical hospital admission in prior 6 months
  • frequent missed appointments (cancel or no-show for >5 primary care or specialty appointments in previous 12 months

Exclusion criteria

Exclusion Criteria:

  • Non-English speaking
  • Patients on hospice, nursing home, rehabilitation, or other institutional or long term care facility
  • Inability to consent (as demonstrated by teach back of the consent process)
  • Diagnosis of metastatic brain cancer
  • Inability to participate in follow up phone due to aphasia, severe hearing impairment, or lack of access to telephone
05

Study design

Phase
Not applicable
Primary purpose
Health services research
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
200 participants (estimated)

Study arms

  • Experimental
    SUMMIT intervention group

    This group will transfer primary care to the SUMMIT team, which consists of: 1 primary care provider, 1 clinical nurse, 1 team manager, 2 care-coordinators, 2 behavioralists, 1 clinical pharmacist. This interdisciplinary team will have reduced patient panel load and increased flexibility in time and scheduling in order to foster trust and continuity with the patient with a goal of decreasing treatment burden and increasing patient capacity. Specific activities that participants will receive include: 1) comprehensive initial intake and care plan development that incorporates patient goal setting; 2) flexible scheduling of appointments with outreach; 3) transitional care coordination; 4) built-in behavioural counselling and case management; 5) regular review of care plan by team members.

    Other: SUMMIT intervention

  • Active comparator
    enhanced usual care group

    This group will continue to receive primary care as usual for 6 months. This includes care provided by the patient's existing primary care provider, access to a clinic's Health Resilience outreach worker, mental health consultation, and other services provided by usual care. After 6 months, the baseline survey is administered and the participant will transfer care to the intervention as described above in the SUMMIT intervention group.

    Other: Enhanced usual care

Interventions

  • OtherSUMMIT intervention

    See description in experimental arm.

    Also known as: intensive primary care team, complex care team

  • OtherEnhanced usual care

    See description in active comparator arm.

    Also known as: usual care

06

What researchers measure

Primary outcomes

  1. Medical Hospitalizations

    Administrative data will be used to determine hospital admissions

    Time frame: 6 months

  2. Emergency Care visits

    Administrative data will be used to determine Emergency Department (ED) visits over study period

    Time frame: 6 months

  3. Primary care utilization

    Clinic administrative data will be used to determine primary care visits over study period

    Time frame: 6 months

  4. Patient Activation Measure (PAM)

    Study survey of the PAM measure is a validated instrument to assess patient self-efficacy

    Time frame: 6 months

  5. Patient Experience (ambulatory CAHPS)

    Study survey of patient reported assessment of patient experience

    Time frame: 6 months

Secondary outcomes

  1. Life Chaos

    Study survey of a validated instrument to assess self-reported life chaos

    Time frame: 6 months

  2. inpatient costs of care

    claims data for patients will be used to determine costs of inpatient care

    Time frame: 6 months

  3. inpatient average length of stay

    Administrative data will be used to determine average length of stay each hospitalization

    Time frame: 6 months

  4. Functional status using Short Form (SF)-12 survey

    patient reported survey of functional status

    Time frame: 6 months

  5. number of falls

    Study survey with question asking how many falls over the last 6 months

    Time frame: 6 months

  6. Edmonton Symptom Assessment Scale (ESAS) palliative measure

    Study survey with one question from the ESAS questionaire

    Time frame: 6 months

  7. Medical Hospitalizations

    Administrative data will be used to determine hospital admissions

    Time frame: 12 months

  8. Emergency Care visits

    Administrative data will be used to determine ED visits

    Time frame: 12 months

  9. Patient Activation Measure (PAM)

    Study survey of the PAM measure is a validated instrument to assess patient self-efficacy

    Time frame: 12 months

  10. Primary care utilization

    Clinic administrative data will be used to determine primary care visits over study period

    Time frame: 12 months

07

Study locations

1 site
  • Central City Concern
    Portland, Oregon 97209, United States
08

References and documents

Publications

  • Chan B, Edwards ST, Devoe M, Gil R, Mitchell M, Englander H, Nicolaidis C, Kansagara D, Saha S, Korthuis PT. The SUMMIT ambulatory-ICU primary care model for medically and socially complex patients in an urban federally qualified health center: study design and rationale. Addict Sci Clin Pract. 2018 Dec 14;13(1):27. doi: 10.1186/s13722-018-0128-y. PubMed 30547847 ↗
  • Chan B, Hulen E, Edwards S, Mitchell M, Nicolaidis C, Saha S. "It's Like Riding Out the Chaos": Caring for Socially Complex Patients in an Ambulatory Intensive Care Unit (A-ICU). Ann Fam Med. 2019 Nov;17(6):495-501. doi: 10.1370/afm.2464. PubMed 31712287 ↗

Individual participant data

Plan to share: Yes — upon request, the investigators can share de-identified, cleaned IPD for other researchers.

Supporting information: Study protocol, Icf

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 21, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03224858
Lead sponsor
Oregon Health and Science University
Responsible party
Brian L Chan (assistant professor, Oregon Health and Science University) — Principal investigator
First posted
Jul 21, 2017
Start date
Sep 27, 2016
Primary completion
Aug 28, 2020
Completion
Dec 30, 2021
Last update
Mar 21, 2025

Study contacts

Brian Chan, MD
principal investigator · Assistant Professor

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2025. You cannot join it, but the record below documents what was studied.

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