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Table 3 Comparison of the content/domain coverage of the CRQ-SAS, SF-36, SGRQ, and WHOQOL-100 with the domains identified in our conceptual framework

From: Patients' perspectives on how idiopathic pulmonary fibrosis affects the quality of their lives

  Number of Items
Domains in conceptual framework CRQ-SAS k = 20† SF-36 k = 36† SGRQ k = 50† WHOQOL-100 k = 100†
1. IPF Symptoms 5‡ 14§ 33 0
2. IPF Therapy 0 0 4** 0
3. Sleep 0 0 0 4
4. Exhaustion 4 2
5. Forethought 0 0 2 0
6. Employment and Finances 0 0 1 8
7. Dependence 0 0 0 0
8. Family 0 1 0 3
9. Sexual Relations 0 0 0 4
10. Social Participation 0 2 2 9
11. Mental and Spiritual Well-being 11 8 6 12
12. Mortality 0 0 0 0
  1. These columns show how each item from the CRQ-SAS, SF-36, SGRQ, and WHOQOL-100 maps onto the domains identified in this study; ‡One item mentions cough; §These items address the impact of physical health on activities but do not specifically address symptoms (e.g., breathlessness and cough); Two items are about wheezing and two are about "attacks of chest trouble", making them irrelevant for patients with IPF; ¶These items ask about energy level and fatigue, but none of them pertain to exhaustion; **Items do not pertain specifically to IPF therapy; CRQ-SAS = Chronic Respiratory Questionnaire Self-Administered Standardized Format; SF-36 = Medical Outcomes Study Short-Form 36-item Instrument; SGRQ = St. George's Respiratory Questionnaire; WHOQOL-100 = World Health Organization 100-item Quality of Life Instrument.