Intra- and Interrater Reliability and Concurrent Validity of a New Tool for Assessment of Breast Cancer related Lymphedema of the Upper Extremity (CLUE).

The CLUE tool shows excellent inter- and intra-rater reliability. The overall CLUE score for the upper extremity also shows moderately strong concurrent validity with objective and subjective measures. This newly developed clinical, physical assessment of upper extremity lymphedema provides standardization and a single score that accounts for multiple constructs. Next steps include evaluation of sensitivity to change, which would establish usefulness to evaluate intervention efficacy.