Experienced versus Inexperienced Interexaminer Reliability on Location and Classification of Myofascial Trigger Point Palpation to Diagnose Lateral Epicondylalgia: An Observational Cross-Sectional Study

Table 2

Interexaminer reliability on MTrP diagnosis.

Agreement on MTrP classification
Evaluators	Extensor carpi radialis brevis			Extensor digitorum communis
	Frequency	Percentage	Pondered Kappa Coefficient	Frequency	Percentage	Pondered Kappa Coefficient
E.1-E.2	85	81.73%	0.614	81	77.88%	0.523
E.1-E.3	57	54.81%	0.386	52	50.00%	0.289
E.2-E.3	54	51.92%	0.3618	58	55.77%	0.303
Agreement on MTrP location
Evaluators	Extensor carpi radialis brevis			Extensor digitorum communis
	Frequency	Percentage	Kappa Coefficient	Frequency	Percentage	Kappa Coefficient
E.1-E.2	89	85.58%	0.617	75	72.12%	0.593
E.1-E.3	57	54.81%	0.016	50	48.08%	0.194
E.2-E.3	63	60.58%	−0.003	50	48.08%	0.196
Complete agreement on MTrP
Evaluators	Extensor carpi radialis brevis			Extensor digitorum communis
	Frequency	Percentage	Kappa Coefficient	Frequency	Percentage	Kappa Coefficient
E.1-E.2	73	70.19%	0.555	60	57.69%	0.438
E.1-E.3	48	46.15%	0.455	41	39.42%	0.224
E.2-E.3	47	45.19%	0.297	44	42.31%	0.124

MTrP: myofascial trigger point; E.1 and E.2: expert evaluators on myofascial diagnosis; E.3: inexperienced evaluator on myofascial diagnosis; Frequency: frequency of agreement between evaluators; Percentage: percentage of agreement between evaluators. () = value < 0.001.