Table 6.

Correlations between pain and results of TMJ depressor, cervical flexor and extensor muscles’ isometric strength, DNFE and MFIQ measurements

Variable		TMJ depressor muscle strength (kg)	Cervical flexor muscle strength (kg)	Cervical extensor muscle strength (kg)	DNFE (mmHg)	MFIQ
Jaw pain	Correlation P value	–0.406b 0.004*	–0.309b 0.026*	–0.414b 0.002*	–0.548a < 0.001*	0.467a < 0.001*
Neck pain	Correlation P value	–0.380b 0.005*	–0.387b 0.005*	–0.380b 0.005*	–0.538a < 0.001*	0.388a 0.004*

TMJ: temporomandibular joint, DNFE: deep neck flexors endurance, MFIQ: mandibular function impairment questionnaire.

*P < 0.05. ^aPearson r. ^bSpearman’s rho.