Longitudinal associations between incident lumbar spine MRI findings and chronic low back pain or radicular symptoms: retrospective analysis of data from the longitudinal assessment of imaging and disability of the back (LAIDBACK)

Table 1 Characteristics of the longitudinal cohort (n = 123)

	Mean (Standard deviation) or N (%)
Sociodemographics
Age (yrs.)	53.4 (9.4)
Female sex	16 (13.0%)
Race
White	104 (84.6%)
Black	10 (8.1%)
Other	9 (7.3%)
Clinical characteristics at baseline
Body mass index (kg/m²)	28.4 (5.2)
Current smoking	26 (21.1%)
Depression	19 (15.6%)
Arthritis	23 (19.0%)
Prior low back pain	55 (44.7%)
Prior low back pain with sciatica	11 (8.9%)
Incident MRI findings over 3-year follow-up
Modic changes (any)	10 (8.1%)
Modic changes (type I)	7 (5.7%)
Facet joint hypertrophy	9 (7.3%)
Annular fissures	6 (4.9%)
Disc height narrowing	6 (4.9%)
Disc dessication	11 (8.9%)
Disc bulging	6 (4.9%)
Spondylolisthesis	4 (3.3%)
Central stenosis	2 (1.6%)
Disc extrusions	5 (4.1%)
Nerve root impingement	4 (3.3%)
Lateral recess stenosis	9 (7.3%)
Disc protrusion	9 (7.3%)
Incident symptoms over 3-year follow-up
Chronic low back pain	24 (19.5%)
Radicular symptoms	70 (56.9%)

ISSN: 1471-2474