Table 6Outcome Variablesa

OutcomeMeasure usedSourceReference(s)
Primary outcomes
 COPD-related QOLSF-CRQPatient survey 55
 DyspneaSF-CRQ dyspnea domainPatient survey 55
Secondary outcomes
 COPD exacerbationsReview of medical recordsElectronic medical records 63
 Exercise capacity6-Minute Walk TestAdministered by RA83, 84
 Self-efficacy for COPD managementStanford Self-efficacy for Managing Chronic DiseasePatient survey 73
Other prespecified outcomes
 Quality of care (PACIC)Patient Assessment of Chronic Illness CarePatient survey74,75
 COPD symptomsCOPD Assessment TestPatient survey 76-78
 Lung functionForced expiratory volume at 1 second by spirometryaAdministered by RANA
 Smoking statusSmoked cigarette in past 30 dPatient surveyNA
 Functional statusBed days due to respiratory problemsPatient survey79, 80
 Correct use of inhalersInhaler checklist for each type of inhaler (adapted)Observed by RA47, 81, 85
 Knowledge of COPDIndividual questions created for studyPatient surveyNA
 Outpatient visitsVisits to PCP, urgent care, or pulmonary specialist in 12 mo before enrollment or during 9-mo study periodElectronic medical recordsNA
 Hospitalizations
  • COPD related
  • For other reason
Rate per person-year during the 12 mo before enrollment or during 9-mo study periodElectronic medical recordsNA
 Emergency department visits
  • COPD related
  • For other reason
Rate per person-year during the 12 mo before enrollment or during 9-mo study periodElectronic medical recordsNA
Post hoc outcomes
 Symptoms of depressionPatient Health QuestionnairePatient survey 82
 Guideline-concordant prescription medicationsPrescription medication corresponding to GOLD recommendations by severity category (A, B, C, or D) of COPDElectronic medical records 6

Abbreviations: COPD, chronic obstructive pulmonary disease; GOLD, Global Initiative for Chronic Obstructive Lung Disease; NA, not applicable; PACIC, Patient Assessment of Chronic Illness Care; RA, research assistant; SF-CRQ, Short-form Chronic Respiratory Disease Questionnaire.

aAll outcomes were measured at enrollment and 9 months; COPD-related QOL, smoking status, and functional status (bed days) were also measured at 3 and 6 months.

From: Does Working with a Health Coach Help Patients with COPD Improve Their Quality of Life and Breathe Easier?

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Does Working with a Health Coach Help Patients with COPD Improve Their Quality of Life and Breathe Easier? [Internet]
Thom DH, Su G, Hessler D, et al.
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