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Table 2 Results of psychometric and Rasch analyses for the domains of the ATAQ-IPF.

From: Development of the ATAQ-IPF: a tool to assess quality of life in IPF

Domain Items (N) Domain-Total Correlation
(p value)
Internal Consistency Reliability* Rasch Model Reliability
Cough 6 0.38
(0.0002)
0.92 0.83
Dyspnea 6 0.71
(<0.0001)
0.87 0.83
Forethought 5 0.67
(<0.0001)
0.89 0.82
Sleep 6 0.46
(<0.0001)
0.67 0.71
Mortality 6 0.42
(<0.0001)
0.74 0.78
Exhaustion 5 0.72
(<0.0001)
0.79 0.8
Emotional Well-being 7 0.68
(<0.0001)
0.85 0.82
Social Participation 5 0.65
(<0.0001)
0.81 0.78
Finances 6 0.49
(<0.0001)
0.9 0.67
Independence 5 0.72
(<0.0001)
0.81 0.74
Sexual Health 5 0.48
(<0.0001)
0.81 0.74
Relationships 6 0.6
(<0.0001)
0.61 0.71
Therapies 6 0.19
(0.07)
0.74 0.51
Total 74 - 0.94 0.93
  1. *Cronbach's coefficient alpha