Table 2 Item wording, subject numbers, non-missing responses, and mean scores.
From: Use of item response theory to develop a shortened version of the EORTC QLQ-BR23 scales
Variable | Non-missing. % | Mean score | SD | θ | Mean Info. | ||||
|---|---|---|---|---|---|---|---|---|---|
−2.0 | −1.0 | 0 | 1.0 | 2.0 | |||||
Functional scale–Body image | |||||||||
I9: Have you felt physically less attractive as a result of your disease or treatment | 7055 (98.04%) | 73.07 | 24.43 | 0.15 | 0.86 | 1.04 | 1.09 | 1.36 | 0.69 |
I10: Have you been feeling less feminine as a result of your disease or treatment? | 7057 (98.07%) | 68.46 | 28.18 | 0.05 | 1.48 | 1.93 | 3.34 | 2.39 | 1.19 |
I11: Did you find it difficult to look at yourself naked? | 7069 (98.24%) | 63.26 | 31.92 | 0.03 | 2.15 | 2.14 | 5.26 | 0.59 | 1.47 |
I12: Have you been dissatisfied with your body? | 7059 (98.10%) | 66.32 | 29.98 | 0.05 | 1.75 | 1.86 | 3.88 | 1.32 | 1.20 |
Symptom scales | |||||||||
Systemic therapy side effects | |||||||||
I1: Did you have a dry mouth? | 7108 (98.78%) | 77.85 | 21.12 | 0.16 | 0.39 | 0.46 | 0.35 | 0.46 | 0.34 |
I2: Did food and drink taste different than usual? | 7047 (97.93%) | 90.62 | 17.20 | 0.02 | 0.10 | 0.35 | 0.60 | 0.54 | 0.33 |
I3: Were your eyes painful, irritated or watery? | 7084 (98.44%) | 81.37 | 21.68 | 0.09 | 0.31 | 0.56 | 0.47 | 0.55 | 0.37 |
I4: Have you lost any hair? | 7069 (98.24%) | 80.99 | 23.28 | 0.10 | 0.22 | 0.34 | 0.33 | 0.35 | 0.24 |
I6: Did you feel ill or unwell? | 7028 (97.67%) | 80.99 | 21.58 | 0.07 | 0.40 | 0.93 | 0.68 | 0.99 | 0.55 |
I7: Did you have hot flushes? | 7051 (97.98%) | 88.86 | 18.37 | 0.04 | 0.13 | 0.36 | 0.49 | 0.44 | 0.28 |
I8: Did you have headaches? | 7050 (97.97%) | 84.43 | 19.73 | 0.07 | 0.25 | 0.55 | 0.51 | 0.51 | 0.36 |
Breast symptoms | |||||||||
I20: Have you had any pain in the area of your affected breast? | 7054 (98.03%) | 79.54 | 21.35 | 0.04 | 0.56 | 1.88 | 0.86 | 2.11 | 0.90 |
I21: Was the area of your affected breast swollen? | 7000 (97.28%) | 85.96 | 20.41 | 0.00 | 0.11 | 2.04 | 1.41 | 3.07 | 1.12 |
I22: Was the area of your affected breast oversensitive? | 6985 (97.07%) | 84.18 | 20.57 | 0.01 | 0.23 | 1.79 | 1.06 | 2.10 | 0.91 |
I23: Have you had skin problems on or in the area of your affected breast (e.g., itchy, dry, flaky)? | 7010 (97.42%) | 82.56 | 21.71 | 0.07 | 0.31 | 0.73 | 0.63 | 0.78 | 0.46 |
Arm symptoms | |||||||||
I17: Did you have any pain in your arm or shoulder? | 7067 (98.21%) | 73.31 | 23.91 | 0.10 | 1.14 | 1.40 | 1.54 | 2.11 | 0.91 |
I18: Did you have a swollen arm or hand? | 7064 (98.17%) | 77.58 | 25.14 | 0.05 | 0.53 | 1.61 | 1.31 | 1.85 | 0.77 |
I19: Was it difficult to raise your arm or to move it sideways? | 7058 (98.08%) | 81.57 | 23.03 | 0.04 | 0.34 | 1.28 | 1.00 | 1.47 | 0.67 |
