Results
dizziness, neck disability, disability
SECONDARY
Descriptive data on symptoms, disability and other health outcomes are presented in Table 
Descriptive data of primary and secondary data at 20 years after surgeryVAS = 100 mm visual analogue scale, NDI = neck disability index, DHI = dizziness handicap inventory, HRQoL = health-related quality of life, Eq. 5D = EuroQol 5 dimensions, EQ VAS = EuroQol 100 vertical VAS, CRI = clinically relevant improvement, 