Table 1.

Cord compression ratios and results of Trömner signs in CSM patients and controls

Characteristics	CSM patients	Controls
No. of subjects	46	30
Cord compression ratios	0.48 ± 0.12*	0.77 ± 0.08*
Manual tests
Positive Trömner signs (diagnostic sensitivity)	43 (93.5%)	0 (NA)
Positive Hoffmann signs (diagnostic sensitivity)	41 (89.1%)	0 (NA)
Quantified tests
Positive Trömner signs (diagnostic sensitivity)	46 (100%)	0 (NA)
Conduction latency (ms)	22.7 ± 3.4	NA
Amplitude of MAP (mV)	2.6 ± 0.8	NA

Values are mean ± standard deviation

No. number, MAP muscle action potential, NA not available

* χ² = 0.832, p = 0.005, chi-square test