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Table 2 Dimensions’ characteristics of the 18-item IPREA

From: Assessment of patients’ self-perceived intensive care unit discomforts: Validation of the 18-item version of the IPREA

Item Label M ± SD a Floor effect % Ceiling effect % Cronbach’s alpha INFIT
18i version 18i version 18i version 16i version 18i version 16i version
1 Noise 29.58 ± 31.73 40.64 4.33 0.784 0.757 0.96 0.93
2 Excess of light 18.91 ± 27.93 58.25 2.31 0.785 0.759 0.95 0.92
3 Different bed 24.81 ± 30.75 48.69 3.72 0.790 0.765 1.04 1.02
4 Sleep deprivation 38.5 ± 33.97 32.8 5.63 0.782 0.755 0.92 0.9
5 Thirst 31 ± 35.04 45.67 7.24 0.794 0.773 1.14 1.15
6 Hunger 13.54 ± 26 71.33 2.62 0.792 0.769 1.05 1.05
7 Feeling of cold 18.88 ± 28.34 60.36 2.31 0.796 0.773 1.16 1.14
8 Feeling of heat 14.29 ± 26.59 70.32 1.91 0.790 0.767 1.03 1.04
9 Pain 29.75 ± 29.49 36.22 2.31 0.790 0.767 1.05 1.05
10 Perf. lines/devices 33.36 ± 31.75 34.61 4.43 0.785 0.761 0.98 0.98
11 Intimacy 14.15 ± 24.95 66.6 1.71 0.787 0.761 0.94 0.93
12 Anxiety 27.05 ± 31.66 46.78 3.82 0.782 0.760 0.92 0.97
13 Isolation 13.19 ± 24.2 68.91 1.21 0.784 0.759 0.88 0.89
14 Visiting hours 9.64 ± 21.71 77.77 1.41 0.793 0.770 1.03 1.02
15 Phone 14.1 ± 28.37 73.74 4.02 0.794 0.771 1.12 1.11
16 Information 20.05 ± 28.74 57.04 2.41 0.788 0.764 1.01 1.01
17 Breathing 28.42 ± 30.94 42.25 3.72 0.793   1.1  
18 Mood disorders 14.36 ± 25.73 68.21 1.91 0.781   0.85  
  16-item total      0.776   1.01
  18-item totala 21.87 ± 13.75 1.1 0 0.798   1.01  
  1. M ± SD mean ± standard deviation; m (IQR) median (interquartile range); INFIT Rasch statistics
  2. ascores ranging from 0 to 100; the higher the score, the higher the discomfort
  3. Italic values: results of 16-item IPREA on the present sample