Table 4

Facet joint involvement by region on the basis of double nerve blocks

Double blocks

Number

% of positive

At least One region positive

500

43% (216)

At least Two regions positive

203

15% (73)

All three regions positive

21

2% (9)

Manchikanti et al. BMC Musculoskeletal Disorders 2004 5:15   doi:10.1186/1471-2474-5-15