Understanding Health Status Changes in COPD Patients
Author Information
Author(s): Kocks JWH, Tuinenga MG, Uil SM, van den Berg JWK, Ståhl E, van der Molen T
Primary Institution: University Medical Center Groningen, The Netherlands
Hypothesis
What is the minimal clinically important difference (MCID) for the clinical COPD questionnaire (CCQ)?
Conclusion
The study found that the minimal clinically important difference of the CCQ total score is approximately 0.4.
Supporting Evidence
- The study involved 210 patients diagnosed with COPD.
- The CCQ was completed multiple times to assess changes in health status.
- The MCID was determined using patient referencing and criterion referencing methods.
Takeaway
Doctors wanted to know how much a patient's health score needs to change for it to be considered important. They found that a change of about 0.4 points is significant.
Methodology
Patients with COPD completed the CCQ questionnaire over several days, and their health outcomes were tracked for a year.
Potential Biases
Potential bias from self-reported measures and the exclusion of certain patient groups.
Limitations
The study excluded patients with asthma and those with severe co-morbidities, which may limit generalizability.
Participant Demographics
Patients were aged 40 and older, with a median age of 71 years, and had a smoking history of over 10 pack-years.
Statistical Information
P-Value
0.000
Confidence Interval
0.39 to 0.44
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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