From: A comparison of physical and psychological features of responders and non-responders to cervical facet blocks in chronic whiplash
Group (n)
C2/3 (%)
C3/4 (%)
C4/5 (%)
C5/6 (%)
C6/7 (%)
WAD_R (58)
41
47
33
48
28
WAD_NR (32)
34
38
64
42