Table 1: Characteristics of the sample.


Sex (% female)79%
Age (mean, range)47 years (18 to 65)
Chronic symptoms (>6 months)63.6%
Cause
 Traumatic51.1%
 Insidious33.9%
 Unknown/other16.1%
P4 (mean/10, range)5.3 (0.5 to 9.5)
NDI (mean/50, range)17 (3 to 44)