Long-term neck and shoulder function among survivors of oropharyngeal squamous cell carcinoma treated with chemoradiation as assessed with the neck dissection impairment index.

GTVnodal was an independent predictor of neck and shoulder impairment. High GTVnodal was associated with increased pain and stiffness, and increased difficulty lifting heavy objects, reaching overhead, overall ability to perform work-related tasks and was associated with participation in post-treatment PT.