Table 3.
The reliability coefficient for all lumbar segmental instability tests
| Variables | Kappa (95% CI) | Percentage agreement | Examiner 1 − ve/+ve | Examiner 2 − ve/+ve |
|---|---|---|---|---|
| (1) PLET | 0·46 (0·20, 0·72) | 0·725 | 19/21 | 26/14 |
| (2) Lumbar flexion ROM >53° | 0·48 (0·16, 0·80) | 0·821 | 7/33 | 10/30 |
| (3) Lack of hypomobility | − 0·020 ( − 0·22, 0·18) | 0·250 | 29/11 | 11/29 |
| (4) Aberrant motion | 0·79 (0·39, 1·19) | 0·975 | 37/3 | 38/2 |
| (5) PIT | 0·71 (0·45, 0·98) | 0·900 | 9/31 | 9/31 |
| (6) Average PSLR >91° | 0·77 (0·47, 1·08) | 0·950 | 35/5 | 35/5 |
| (7) Locating the pain-provoking segment | 0·41 (0·18, 0·63) | 0·60 | 4/36 | 2/38 |
PLET: Passive lumbar extension test; ROM: range of motion; PA glide: posteroanterior glide; PIT: prone instability test; PSLR: passive straight-leg raising.
*
Locating the pain-provoking segment is the first phase of PIT and not one of the six segmental instability tests.