Table 2.

Comparison of all EMG variables in predicting back pain in no-history (N) subjects based on self-rating

Parameters	Cut-off	AUC	95% CI for AUC	Sensitivity (%)	Specificity (%)	χ2 sig. (p)
IMF (Hz)	49	0.76	0.60–0.91	83	60	0.01
MF slope	−0.203	0.63	0.44–0.82	58	77	0.03
HW (Hz)	56	0.62	0.45–0.80	58	73	0.04
RMS (Hz)	87	0.62	0.47–0.78	66	67	0.53
RMS slope	0.309	0.54	0.39–0.69	58	55	0.56
IRMS (Hz)	88	0.64	0.48–0.80	75	59	0.66