Consensus of potential modifiable prognostic factors for persistent pain after a first episode of nonspecific idiopathic, non-traumatic neck pain: Results of nominal group and Delphi technique approach

Identify and establish consensus regarding potential prognostic factors for the development of chronic pain after a first episode of idiopathic, non-traumatic neck pain. Design: This study used two consensus group methods: a modified Nominal Group (m-NGT) and a Delphi Technique.