The Nordic Subpopulation Research Programme: prediction of treatment outcome in patients with low back pain treated by chiropractors - does the psychological profile matter?

Table 3 Description of the 731 chiropractic patients who took part in a practice-based outcome study on low back pain

Description of variables	Numbers of respondents	Minimum and maximum estimates obtained	Numbers in sub-groups	Mean/Median (95%CI)
Anxiety index (range 0-21)	722	0-19		Mean: 5.4 (5.2-5.7)
normal 0-7			404
borderline 8-9			252
clinical significance 10-21			66
Depression index (range 0-21)	722	0-16		Mean:3.8 (3.5-4.0)
normal 0-7			541
borderline 8-9			155
clinical significance 10-21			26
Cognitive anxiety (range 0-25)*	706	0-100*	NA	Mean 49.7 (48.1-51.2)
Escape avoidance (range 0-25)*	708	0-96*	NA	Mean: 46.7 (45.2-48.1)
Fearful thoughts (range 0-25)*	720	0-96*	NA	Median: 24 (22-26)
Physiological symptoms and signs Of pain (range 0-25)*	714	0-96*	NA	Median: 24 (24-26)

Psychological profile at base-line
*No known cut-off points for clinically significant threshold values, therefore these variables weree transformed into % and reported as mean or median values only. For this reason the range (reported as absolute values in column 1) and the estimated values (minimum, maximum, mean and median values reported in columns 3 and 5) do not seem to make sense.

ISSN: 2045-709X