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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: J Hand Surg Am. 2011 Oct 5;37(1):10–17. doi: 10.1016/j.jhsa.2011.08.016

Table 4.

Test characteristics of hand diagram rating systems relative to abnormal nerve conduction values

DSL (n=216) DML (n=219) MUD (n=213)
Sensitivity (95% CI)

Katz* .38 (.28–.50) .33 (.20–.46) .40 (.28–.52)
MNDS** .54 (.43–.65) .55 (.40–.69) .58 (.45–.69)
Long Finger .67 (.55–.77) .67 (.52–.79) .67 (.55–.78)
Index Finger .54 (.43–.65) .55 (.40–.69) .59 (.47–.70)
Thumb .31 (.21–.42) .35 (.22–.50) .33 (.22–.45)

Specificity (95% CI)

Katz* .81 (.73–.87) .76 (.69–.82) .80 (.72–.87)
MNDS** .76 (.68–.83) .70 (.62–.76) .75 (.67–.82)
Long Finger .73 (.64–.80) .65 (.57–.72) .70 (.62–.77)
Index Finger .73 (.64–.80) .67 (.60–.74) .73 (.65–.80)
Thumb .79 (.71–.85) .77 (.70–.83) .79 (.71–.85)

Positive Predictive Value (95% CI)

Katz* .54 (.41–.67) .29 (.18–.41) .51 (.37–.64)
MNDS** .57 (.45–.68) .35 (.25–.47) .55 (.43–.66)
Long Finger .59 (.49–.70) .37 (.27–.47) .54 (.43–.64)
Index Finger .54 (.43–.65) .34 (.24–.45) .53 (.42–.64)
Thumb .46 (.33–.60) .32 (.20–.45) .44 (.31–.59)

Negative Predictive Value (95% CI)

Katz* .69 (.61–.76) .79 (.72–.85) .70 (.62–.77)
MNDS** .74 (.65–.81) .84 (.76–.89) .77 (.69–.84)
Long Finger .78 (.70–.85) .87 (.79–.92) .80 (.72–.87)
Index Finger .73 (.64–.80) .83 (.76–.89) .77 (.69–.84)
Thumb .65 (.58–.73) .80 (.73–.86) .69 (.61–.76)
*

Classic or Probable rating

**

MNDS rating of 2