Validation of “Victorian institute of sports assessment for patellar tendons” in patellofemoral pain: Reliability, interpretability and feasibility study

Table 1 Participants and sample characteristics

			Women (n = 47)	Men (n = 26)	Total (n = 73)
Weight (kg)		μ	66	87.59	73.89
		SD	11.7	11.20	15.3
Height (cm)		μ	165	181	171
		SD	6	5	9
Time with pain (months)		Med	48	66	54
		IQR	21-84	27-129	24-96
Affected knees Q-angle (degree)		Med	19	17	18
		IQR	18-24	16-18	16-22
Impairment	Bilateral	n	20	10	30
		%	27.4	13.6	41.1
	Unilateral	n	27	16	43
		%	37	21.9	58.9

Med: Median; IQR: Interquartile range.

Table 2 Content validity: Concordance between experts calculated by Aiken's V Coefficient

Item	Relevance	Clarity
1	0.80	1
2	0.93	1
3	0.80	0.70
4	0.80	0.80
5	0.93	0.93
6	0.70	0.83
7	0.90	0.83
8	0.90	0.63a

^aValue with a V 0.70.

Values represent the Aiken’s V Coefficient (95%CI). Level of agreement: No acceptable.

Table 3 Factor Analysis with Varimax rotation suggesting the 2-factor solution

Item	Loading
	Component 1	Component 2
2	0.763
3	0.732
4	0.773
5	0.848
6	0.802	0.363
1		0.656
7		0.736
8		0.816

Total variance explained, 63.48%.