Table 1 Clinimetric properties of the Breast Edema Questionnaire (BrEQ)
From: Breast edema, from diagnosis to treatment: state of the art
Clinimetric property | Breast edema symptoms (part 1) | Activity limitations / participation restrictions (part 2) |
|---|---|---|
Content validity | Good for part 1 and part 2 | |
Convergent validity | Breast symptoms separately correlated moderately with skin thickness Total symptom score correlated strongly with skin thickness | Total score of activity limitations correlated moderately with - global health status (subscale EORTC QLQ C30) - physical functioning (subscale EORTC QLQ C30) - role functioning (subscale EORTC QLQ C30) - total score of the McGill Quality of Life Questionnaire Total score of activity limitations correlated strongly with - physical wellbeing (subscale McGill QOL questionnaire) |
Known-groups validity | Patients with breast edema (diagnosed with US) have a significant higher total symptom score compared to patients without breast edema | Patients with breast edema score significantly higher on activity limitations compared to patients without breast edema |
Test-retest reliability | Reliability is strong for the total symptom score Reliability is between strong and moderate for the separate symptoms | Reliability is strong for the total score of activity limitations |
Cut-off value | A score cut-off point of ≥8.5 discriminates between patients with breast edema and those without (therefore a score of 9 or higher warrants the diagnosis of breast edema) | / |