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Table 1: 
Structural abnormality compared by age for 91 data base patients with low back pain and type 1 pedicle marrow changes
Age <30 yrAge 30–50 yrAge ≥50 yr
No. with type 1 changes271747
Sex (M/F)24/33/1416/31
Diagnosis
Fracture, pars1715
Fracture, pedicles511
Degenerative facet disease01541
No definitive diagnosis5