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Table 5 Test – retest reliability from Time 1 (2 weeks before treatment) to Time 2 (week of treatment), ICC and Spearman’s Rho; multi-item scales linear transformed data, single item scales raw data

From: International validation of the EORTC QLQ-PRT20 module for assessment of quality of life symptoms relating to radiation proctitis: a phase IV study

QLQ-PRT20 Scales [range], n T1 Mean(SD)
[range]
T2 Mean(SD)
[range]
ICC of proposed scale** or kappa T1 –T2 Spearman’s Rho or Phi
Bowel Control [0–100], 329 8.95(15.43)
[0–83]
10.18(15.60)
[0–100]
0.77 0.68*
Bloating and Gas [0–100], 329 6.35(14.19)
[0–73]
7.58(13.83)
[0–75]
0.61 0.67*
Emotional Function/Lifestyle
[0–100], 328
9.55(13.65)
[0–67]
11.56(14.75)
[0–83]
0.74 0.62*
Pain [0–100], 329 5.17(12.32)
[0–89]
5.51(11.56)
[0–78]
0.76 0.64*
Leakage [0–100], 329 4.68(12.77)
[0–100]
5.72(13.14)
[0–100]
0.67 0.48*
Diarrhoea Medicationa [yes/no], 325 Yes = 8 Yes = 13 0.30 k 0.31P*
Bowel openings in 24 ha
[0 +], 316
2.26(2.23)
[0–25]
2.47(1.96)
[1–20]
0.72 0.70*
Requesting more assistancea
[yes/no], 304
Yes = 33 Yes = 29 0.57 k 0.57P*
  1. a Single item scales raw data, k = kappa, p = Phi, * p < .01, ** linear transformed data