Liverpool carpal tunnel scoring system to predict nerve conduction study results: A prospective correlation study

Table 1 The Liverpool ten-point carpal tunnel syndrome scoring system

	1 point	1 point	0 point
Symptoms
Tingling (Katz hand diagram)	Classic pattern	Probable pattern	Unlikely pattern
Numbness (Katz hand diagram)	Classic pattern	Probable pattern	Unlikely pattern
Nocturnal paresthesia	Yes		No
Bilateral symptoms	Yes		No
Signs
Weak thumb abduction	Yes		No
Tinels sign	Yes		No
Phalen’s sign	Yes		No
Hypoalgesia	Yes		No
Risk factors
Age > 40 yr	Yes		No
Female	Yes		No