Table H1Characteristics of included studies (KQ1, observational studies)

StudyCountry;
Organization
Explicitly PCMH?; Intervention ComponentsPractices (n)SubjectsOutcomes Reported; Followup PeriodaStudy Quality
Domino, 20091U.S.A.

Other: State-wide medical home network
Yes
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
  6. Enhanced access
  7. Structural changes
Intervention (NR)

Usual care (NR)
Children with asthma – 207,439

Practice staff – NR
Process of care
Economic

Monthly estimates based on 4 years of data
Good
Martin, 20072U.S.A.

Stand-alone primary care provider: Family practice
Yes
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
  6. Enhanced access
  7. Structural changes
Intervention (1)

Usual care (NR)
CSHCN – 199

Practice staff - NR
Economic

2 years
Fair

Possible selection bias

Possible detection bias

Reid, 20093-5U.S.A.

HMO: Group Health Cooperative of Puget Sound
Yes
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
  6. Enhanced access
  7. Structural changes
Intervention (1)

Usual care (19)
Adults – 3353

Practice staff – 82
Patient experiences
Staff experiences
Process of care
Economic

2 years
Fair

Possible selection bias

Possible detection bias

Steele, 20106,7U.S.A.

HMO: Geisinger
Yes
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
  6. Enhanced access
  7. Structural changes
Intervention (11)

Usual care (75)
Older adults with chronic illness – 15,310

Practice staff – NR
Economic

1 year
Moderate risk of bias

Possible detection bias

Boyd, 20078-10U.S.A.

Integrated delivery system Health plan for military retirees; Other: University affiliated community PC practices
No
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
  6. Enhanced access
  7. Structural changes
Intervention (1)

Usual care (1)
Older adults with chronic illness – 150

Practice staff – 2
Patient experiences
Economic

6 months
Fair

Possible selection bias

Possible attrition bias

Analysis not adjusted for clustering

Dorr, 200811,12U.S.A.

Integrated delivery system: Intermountain Group Health
No
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
  6. Enhanced access
  7. Structural changes
Intervention (7)

Usual care (6)
Older adults with chronic illness – 3432

Practice staff – NR
Clinical
Economic

2 years
Good
Hebert, 200313Canada (Quebec)

Non U.S. government: Canadian Healthcare System
No
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
  6. Enhanced access
  7. Structural changes
Intervention (1 region; # of clinics NR)

Usual care (1 region; # of clinics NR)
Older adults with chronic illness – 482

Practice staff - NR
Clinical

2 years
Poor

Possible selection bias

Possible performance bias

Possible detection bias

Taplin, 199814U.S.A.

HMO: Group Health Cooperative of Puget Sound
No
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
  6. Structural changes
Intervention (1)

Usual care (27)
Adults – 398,000

Practice staff - NR
Process of care

2 years
Fair

Possible selection bias

Possible performance bias

Wise, 200615U.S.A.

Other insurance organization: Partnership Health in partnership with University of Michigan's Medical Management Center
No
  1. Quality included
  2. Coordinated care
  3. Team
  4. Sustained partnership
  5. Comprehensive
Intervention (NR)

Usual care (NR)
All ages; high utilizers – 54,479

Practice staff - NR
Process of care
Clinical
Economic

1 year
Fair

Possible performance bias

a

Based on longest followup period among abstracted outcomes.

b

The most significant quality limitations are listed for all “Fair” and “Poor” studies.

Abbreviations: CSHCN = children with special health care needs; HMO = health maintenance organization; KQ = key question; NR = not reported; PC = primary care; PCMH = patient-centered medical home

From: Appendix H, Characteristics of Included Studies (KQs 1–3, Observational Studies)

Cover of Closing the Quality Gap: Revisiting the State of the Science (Vol. 2: The Patient-Centered Medical Home)
Closing the Quality Gap: Revisiting the State of the Science (Vol. 2: The Patient-Centered Medical Home).
Evidence Reports/Technology Assessments, No. 208.2.
Williams JW, Jackson GL, Powers BJ, et al.

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