Reliability and validity of Chinese version of a tool to assess the quality of life in idiopathic pulmonary fibrosis in patients with interstitial lung disease.
Rui-Li Pan, Jeffrey J Swigris, Yan-Wei Zhao and 3 others
PMID 31406867WHAT IT FOUND
Chinese version of a pulmonary fibrosis quality-of-life questionnaire worked well overall in hospitalized interstitial lung disease patients.
Therapy and sexual health scores were weaker, so interpret those carefully.
Key findings
01The total score had internal consistency 0.96 and two-week test-retest reliability 0.950, but the therapies domain had internal consistency 0.60, below the 0.70 benchmark.
02The total score correlated with the St. George's Respiratory Questionnaire total score (r=0.709), while the sexual health domain did not correlate significantly with any SGRQ dimension.
03Patients with IPF reported total scores of 287.90 and patients with other ILDs reported 250.74; high scores mean greater impairment.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
Most subjects were hospitalized, so results may not reflect Chinese patients with ILD in general. The therapies domain had internal consistency below the 0.70 benchmark. The sexual health domain did not correlate significantly with SGRQ dimensions. No factor analysis was done to retest the subscale structure. Test-retest reliability was based on only 15 subjects. Some items may not apply in China, such as limiting travel because of IPF. The questionnaire takes 40 minutes to complete.
Declared interests
The authors declared no conflicts of interest. Financial support came from the China Medical Board.
The easy way to misread this
Do not treat every domain as equally dependable. The therapy domain fell below the usual internal consistency threshold, and the sexual health domain did not correlate with respiratory disability scores.