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
What statistical measure is commonly used to evaluate the internal consistency of the LCQ?
Answer: Cronbach's alpha
Cronbach's alpha measures how closely related items within the LCQ are to each other, directly assessing internal consistency.
What is the generally accepted minimum Cronbach's alpha value for the LCQ to demonstrate adequate internal consistency?
Answer: 0.7
A Cronbach's alpha of 0.7 or above is the widely accepted threshold indicating adequate internal consistency for a health-related quality-of-life questionnaire.
The LCQ demonstrates acceptable internal consistency across which of its domains?
Answer: All three domains: physical, psychological, and social
The LCQ demonstrates acceptable internal consistency across all three of its domains—physical, psychological, and social—supporting its construct validity.
Which type of reliability assesses whether the LCQ yields consistent scores when completed by the same patient on two separate occasions without any change in clinical condition?
Answer: Test-retest reliability
Test-retest reliability evaluates the reproducibility of LCQ scores in clinically stable patients over a defined time interval.
What is the typical interval used between administrations in LCQ test-retest reliability studies?
Answer: 1–2 weeks
A 1–2 week interval is standard in LCQ reliability studies as it is long enough to reduce recall bias but short enough to ensure clinical stability.
Which factor would MOST undermine the test-retest reliability of the LCQ?
Answer: Clinical change in the patient's cough between administrations
If a patient's condition changes between the two administrations, score differences reflect true clinical change rather than measurement error, invalidating the test-retest comparison.
The LCQ was originally validated in which patient population, forming the foundation for its reliability evidence?
Answer: Adults presenting to a specialist cough clinic
The original LCQ validation by Birring et al. (2003) was conducted in adults attending a specialist cough clinic, establishing foundational reliability and validity data.