Table 3

Accuracy of PPIVMs for detecting lumbar segmental instability

Flexion PPIVMs

LSI

Sensitivity (CI)

Specificity (CI)

LR+ (CI)

LR- (CI)

Rotation LSI

.05 (.01, .36)

.99 (.96, .1.00)

4.12 (.21, 80.3)

.96 (.83, 1.11)

Translation LSI

.05 (.01, .22)

.995 (.97, 1.00)

8.73 (.57, 134.7)

.96 (.88, 1.05)

Extension PPIVMs

LSI

Sensitivity (CI)

Specificity (CI)

LR+ (CI)

LR- (CI)

Rotation LSI

.22 (.06, .55)

.97 (.94, .99)

8.40 (1.88, 37.55)

.80 (.56, 1.13)

Translation LSI

.16 (.06, .38)

.98 (.94, .99)

7.07 (1.71, 29.2)

.86 (.71, 1.05)

Notes: PPIVMs = passive physiological intervertebral motion tests; LSI = lumbar segmental instability; CI = 95% confidence interval; LR+ = likelihood ratio for a positive test; LR- = likelihood ratio for a negative test; Accuracy was assessed by lumbar region (upper lumbar and lower lumbar), overall results are presented; Items in bold type are statistically significant at p < 0.05.

Abbott et al. BMC Musculoskeletal Disorders 2005 6:56   doi:10.1186/1471-2474-6-56