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Table 3 Cronbach alpha, Intraclass correlation coefficient, SEM and MDC and their corresponding 95% CI for the participants with BCRL

From: Psychometric performance of the Arabic versions of the Functional Assessment of Cancer Therapy-Breast plus Arm morbidity (FACT-B + 4) in patients with breast cancer related lymphedema: cross-sectional study

Subscales Internal consistency α FACT-B + 4 (Time 1) FACT-B + 4 (Time 2) P value ICC 95% CI for ICC2,1 SEM MDC95 95% CI for MDC95
PWB (7; 0–28) 0.84 19.70 ± 6.68 18.79 ± 5.66 0.50* 0.87 0.76–0.93 2.23 6.18 − 5.27 to 7.09
SWB (7; 0–28) 0.74 23.25 ± 5.38 23.12 ± 5.74 0.82* 0.79 0.62–0.89 2.54 7.06 − 6.65 to 7.47
EWB (6; 0–24) 0.75 21.05 ± 2.90 20.76 ± 2.83 0.23* 0.87 0.77–0.93 1.03 2.41 − 2.12 to 2.70
FWB (7; 0–28) 0.80 23.38 ± 3.75 23.32 ± 3.33 0.90* 0.72 0.67–0.85 1.87 5.20 − 5.14 to 5.26
BC 10 (10; 0–40) 0.75* 24.35 ± 6.61 23.94 ± 5.69 0.46* 0.86 0.74–0.93 2.31 6.39 − 5.98 to 6.80
ARM (5; 0–20) 0.84 10.85 ± 5.39 10.47 ± 5.58 0.23* 0.94 0.89–0.97 1.34 3.72 − 4.1 to 3.34
FACT-B TOI (24; 0–96) 0.85 67.44 ± 13.23 66.05 ± 11.18 0.42* 0.89 0.80–0.94 4.06 11.25 − 9.87 to 12.63
FACT-G (27; 0–108) 0.87 87.40 ± 14.17 86.00 ± 12.13 0.37* 0.92 0.84–0.96 3.73 10.34 − 8.94 to 11.74
FACT-B (37; 0–148) 0.89 111.75 ± 19.09 109.94 ± 16.48 0.32* 0.93 0.86–0.96 4.72 13.07 − 11.26 to 14.88
FACT-B + 4 (41; 0–164) 0.90 122.23 ± 23.02 120.79 ± 20.52 0.43* 0.94 0.88–0.97 5.34 14.80 − 13.37 to 16.23
  1. Cronbach’s alpha excluding item (P2), PWB physical well-being, SWB social/ family well-being, EEWB emotional well-being, FWB functional well-being, FACT-B TOI = (PWB + FWB + BCS), FACT-B + 4 = PWB + SWB + EWB + FWB + BCS + ARM, ICC intraclass correlation coefficient, CI confidence interval, SEM standard error of the measurement, MDC minimal detectable change, FACT-B + 4 Functional Assessment of Cancer Therapy-Breast plus Arm morbidity
  2. *Non-significant P values (P > 0.05) for Wilcoxon test