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Table 2 Summary of Rasch analysis results for the physical and emotional functioning domains

From: Development of a new tool for assessing Health-Related Quality of Life in patients with primary hyperparathyroidism

Physical functioning domain (factor 1) (PHPQoL-9)
Item no. Item Measure Error Infit Outfit
2 I’ve felt sleepy after getting up in the morning and it’s been hard to get going 0.01 0.14 1.36 1.29
26 I’ve been able to carry out my activities as normal −0.89 0.15 1.02 1.29
27 I’ve restricted some leisure activities because of the symptoms of the illness −1.04 0.16 1.21 1.14
24 I’ve had back pain 0.72 0.14 1.19 1.18
5 I’ve noticed that I get short of breath when I walk quickly −0.33 0.15 1.18 1.06
25 My bones and/or joints have ached 1.15 0.015 1.18 1.06
28 The illness has limited what household chores I do −0.74 0.15 1.02 0.90
4 I’ve found it difficult to walk for a long time 0.25 0.14 0.88 0.89
3 I’ve felt weak 0.15 0.14 0.62 0.65
Emotional functioning domain (factor 2) (PHPQoL-7)
Item no. Item Measure Error Infit Outfit
17 I’ve found it hard to concentrate −0.17 0.14 1.28 1.24
34 I’ve noticed I find it more difficult to concentrate at work than before −0.73 0.16 1.19 1.04
12 I’ve slept well −0.51 0.15 1.13 1.08
19 I’ve been worried, not only about the illness but also its complications 0.25 0.14 1.09 1.06
13 I’ve woken up during the night 0.80 0.14 0.85 0.90
8 I’ve felt depressed 0.15 0.14 0.84 0.83
7 I’ve been irritable 0.05 0.14 0.81 0.79