The Cluster consists of the following 5 items:
- Flick Sign: Patients report pain/tingling relief by shaking their hand repeatedly
- Wrist Ratio Index > 0.67 (AP/latero-medial diameter of the wrist)
- SSS Score > 1.9 (SSS = Brigham and Women’s Hospital Hand Symptom Severity Scale )
- Diminished sensation in the top of the thumb compared to the thenar eminence
- Age > 45
Positive Outcome: At least 4 out of 5 positive items from above
|
Study |
Reliability | Sn | Sp | LR+ |
LR- |
| Wainner et al. (2005): 2 or more positive out of 5 |
NA |
98 | 14 | 1.1 |
NA |
| Wainner et al. (2005): 3 or more positive out of 5 |
NA |
98 | 54 | 2.1 |
NA |
| Wainner et al. (2005): 4 or more positive out of 5 |
NA |
77 | 83 | 4.6 |
NA |
| Wainner et al. (2005): 5 positive out of 5 |
NA |
18 | 99 | 18.3 |
NA |
| Comment: Phalen’s Test, Tinel Sign and strength testing of the abductor pollicis brevis were not included in the cluster as their predictive ability was too low. There are no studies who have yet validated this cluster yet, which is why its clinical usefulness is only moderate. |
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