Reliability, Validity, and Responsiveness of the Craniocervical Flexion Test in People Who Are Asymptomatic and Patients With Nonspecific Neck Pain: A Systematic Review and Meta-Analysis.

The CCFT might help to detect impairment in DCF control and identify patients who have nonspecific neck pain and who would benefit from a targeted intervention. However, the poor reliability of most versions of the test greatly limits its application in clinical practice. Only CCFT-PI and CCFT-CPI seem reliable enough to help in clinical decision-making at the individual level.