Table 3.
Reference | Population studied | Numbers of subjects (number male) |
Mean age (range) |
Number of levels examined per person |
Grade of nerve root impingement |
Prevalence % (95% CI) |
---|---|---|---|---|---|---|
Boos et al, 199520 | Volunteers from trauma clinic who had never consulted or been absent from work because of LBP | 46 (34) | 36 (20-50) | 5 | Contact or displacement | 17% (8%-31%) |
Jarvik et al, 200116 | Patients with no LBP in the past 4 months that was more than mildly bothersome | 148 (131) | 54 (36 -71) | 5 | Compression Displacement or compression |
4% (1%-15%) 3% (1%-8%) |
Kjaer et al, 20056 | Volunteers from general population with no LBP in past year | 128 (NA*) | 40 (40-40) | 5 | Displacement or compression | 4% (1%-9%) |
Savage et al, 19977 | Volunteers from 5 occupations with no LBP in past year | 70 (70) | NA* (≥20- ≤58) |
5 | Compression | 3% (0%-10%) |
Weishaupt et al, 199818 | Volunteers referred for non-spinal imaging who had never consulted or been absent from work because of LBP | 60 (30) | 35 (20-50) | 5 | Contact Displacement Compression |
23% (13%- 36%) 5% (1%-14%) 2% (0%-9%) |
Carragee et al, 200642 | Cervical disc disease patients with no history of LBP causing functional loss or requiring treatment | 200 (119) | 39 (NA*) | 5 | Contact Displacement or compression |
11% (7%-15%) 3% (1%-6%) |
NA = not available