Table 3

2-way contingency table comparing the radiological and clinical findings on one hand with intraoperative findings on the other hand.

P-value

Sensitivity

Specificity

PPV

NPV

Root injuries on MRI

No

Yes

Root injuries

No

17

2

at operation

Yes

2

13

<0.001

0.90

(0.76-0.96)

0.87

(0.70-0.95)

0.90

(0.76-0.96)

0.87

(0.70-0.95)

Root injuries suspected clinically

Root injuries

No

7

12

at operation

Yes

0

15

0.011

1

(0.69-1)

0.56

(0.48-0.56)

0.37

(0.25-0.37)

1

(0.86-1)

PPV indicates positive predictive value. NPV indicates negative predictive value

Abul-Kasim et al. Journal of Brachial Plexus and Peripheral Nerve Injury 2010 5:14   doi:10.1186/1749-7221-5-14