Table 3: Dream variables and SF-12 scores of patients with chronic back pain and healthy controls.

Category Patients
(N = 100)		 Control Sample
(N = 270)
Dream recall frequency 3.14 ± 2.00 3.38 ± 1.76
Emotional tone of dreams1 -0.32 ± 1.00 0.22 ± 0.74
Pain dreams 16.0% 8.5%
Physical Health Score2 28.03 ± 6.95 50.53 ± 8.08
Mental Health Score2 40.09 ± 11.87 47.69 ± 9.36

1N = 88 for patients, N = 253 for control sample, 2N = 99 for patients, N = 267 for control sample