Impairment of neck and shoulder function after neck dissection: a comparative study of goniometry, EMG and paper pencil tool in a randomized controlled trial of level IIb preserving verses conventional neck dissection

The study demonstrates agreement between shoulder function measurements (goniometry and EMG) but discordance with NDII. This discrepancy may arise from the distinct constructs used by NDII to assess neck dissection impairment, highlighting potential limitations in its sensitivity to functional recovery.