227 patients with chronic non-specific low back pain (LBP) were randomized to undergo an active rehabilitation program focused on active physical treatment, cognitive-behavioural treatment, a combination of both, or placed on a waiting list (control group). The primary outcome were subjective variables in pain and function. Results indicated that the two intervention treatments and the combined treatment were effective compared to the control group. No significant clinical differences were seen between the individual interventions and the combination group.