LCQ Reliability and Reproducibility Flashcards
7 cards from real LCQ practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 LCQ Reliability and Reproducibility flashcards as text
The minimal clinically important difference (MCID) for the LCQ total score has been estimated at approximately:
Answer: 1.3 points
An MCID of approximately 1.3 points on the LCQ total score represents the smallest change patients perceive as meaningful in their cough-related quality of life.
Understanding the MCID of the LCQ is most critical for:
Answer: Interpreting whether a treatment-related score change is meaningful to patients
The MCID helps clinicians and researchers determine whether observed LCQ score changes represent real, patient-meaningful improvement rather than random measurement fluctuation.
The term 'responsiveness' of the LCQ refers to its ability to:
Answer: Detect clinically meaningful changes in health status over time
Responsiveness is the psychometric property reflecting the LCQ's sensitivity to detect genuine longitudinal changes in cough-related quality of life following an intervention.
Which approach is commonly used to estimate the LCQ MCID using an anchor-based method?
Answer: Correlating LCQ score change with a Patient Global Impression of Change (PGIC) rating
The anchor-based method links LCQ score change to a patient-rated external anchor such as the Patient Global Impression of Change, grounding the MCID in patient perception.
A ceiling effect in the LCQ occurs when:
Answer: Many patients score near the maximum value, limiting detection of further improvement
A ceiling effect occurs when scores cluster at the top of the scale, reducing the LCQ's ability to detect further improvement in patients who already have high quality-of-life scores.
Which LCQ domain has been reported to show the highest responsiveness to treatment in clinical studies?
Answer: Physical domain
The physical domain, which directly captures symptoms associated with coughing such as breathlessness and chest discomfort, tends to show the greatest responsiveness to effective cough treatments.
To adequately power a clinical trial using the LCQ as the primary outcome measure, a researcher must know the:
Answer: Expected MCID and the standard deviation of LCQ scores in the target population
Sample size calculations require both the expected clinically meaningful difference (MCID) and the variability of scores (SD) to determine adequate statistical power.