Derivation and validation phase for the development of clinical prediction rules for rehabilitation in chronic nonspecific low back pain patients: study protocol for a randomized controlled trial

Table 2 Exclusion criteria

Exclusion criteria	Rationale
Spinal canal stenosis	Back pain possibly due to, specific disease
Spondylolisthesis
Spondylitis
Large herniated disc sciatica
Radiating pain below the knee
Previous back surgery
History of vertebral fracture
Malignancy
Muscle-, nerve-, skin- or joint diseases
Known pregnacy	Pregnancy-related low back pain is different in etiology and time course than the target condition for the study (nonspecific chronic low back pain)
Lack of consent	Research policy

ISSN: 1745-6215