Table 4 Variability in intertester reliability between subgroups and tests
Classification scheme | Subgroup & Test Variables* | Percentage agreement | Kappa value | Confidence interval |
|---|---|---|---|---|
Mechanical Diagnosis and Treatment | Most reliable subgroup-Derangement | Â | 0.96 | --- |
| Â | Least reliable subgroup-Unknown | Â | --- | --- |
| Â | Most reliable test-Centralization | Â | 0.51-0.96 | --- |
| Â | Least reliable test- Lateral shift | Â | 0.52 | --- |
Treatment Based Classification* | Most reliable subgroup-Specific exercise | 95% | --- | --- |
*Traction subgroup excluded in all cited studies | Least reliable subgroup-Stabilization | 64% | --- | --- |
| Â | Most reliable test-Repeated flexion | Â | 0.46 | --- |
| Â | Least reliable test-Aberrant motion | Â | 0.18 | --- |
Pathoanatomic Based Classification | Most reliable subgroup-Zygopophyseal joint syndrome, Dysfunction syndrome, postural syndrome | 100% | 1.00 | 1.00 to 1.00 |
| Â | Least reliable subgroup-Myofascial pain (MFP) syndrome and other | MFP = 74% | MFP = 0.44 | MFP = 0.25 to 0.64 |
| Â | Most and least reliable test-Unknown | Other = 82% | Other = 0.32 | Other = 0.07 to 0.58 |
| Â | Â | --- | --- | --- |
Movement System Impairments | Most reliable subgroup-Flexion, Rotation with flexion | 100% | --- | --- |
| Â | Least reliable subgroup-Rotation | 84% | --- | --- |
| Â | Most reliable test-Unknown | Â | Â | Â |
| Â | Least reliable test-Unknown | Â | Â | Â |
O'Sullivan Classification Scheme | Most reliable subgroup-Control-passive extension | 100% | --- | --- |
| Â | Least reliable subgroup-Control-Active extension | 50% | --- | --- |
| Â | Most and least reliable test-Unknown | --- | --- | --- |