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Table 1 Hypotheses to assess construct validity

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

Construct Considering all correlation coefficients between most similarities’ subscale of the FACTB + 4 and the corresponding domains of SF-36, had moderate correlation
1. FACTB + 4 physical well-being and SF-36 physical function
2. FACTB + 4 physical well-being and SF-36 role-physical
3. FACTB + 4 emotional well-being and SF-36 role-emotional
4. FACTB + 4 social well-being and SF-36 social functioning
Known-groups validity Patients with BCRL have:
5. A lower total score on the FACTB + 4
6. A lower score on teach subscale the FACTB than BC participants without lymphedema
  1. SF-36 Medical Outcomes Study 36-Item Health Survey, FACTB + 4 Functional Assessment of Cancer Therapy-Breast plus Arm morbidity version4