Table 2.

Pearson correlation

Intraobserver correlations
		Right knee first observer measurement 2	Left knee first observer measurement 2	Right knee second observer measurement 2	Left knee second observer measurement 2
Right knee first observer measurement 1	Pearson correlation	0.962**	0.775**	0.971**	0.783**
	Sig. (2-code)	0.000	0.000	0.000	0.000
	N	191	191	191	191
	Sig. (2-code)		0.000	0.000	0.000
	N	191	191	191	191
Left knee first observer measurement 1	Pearson correlation	0.782**	0.961**	0.802**	0.958**
	Sig. (2-code)	0.000	0.000	0.000	0.000
	N	191	191	191	191
	Sig. (2-code)	0.000		0.000	0.000
	N	191	191	191	191
Right knee second observer measurement 1	Pearson correlation	0.947**	0.798**	0.969**	0.811**
	Sig. (2-code)	0.000	0.000	0.000	0.000
	N	191	191	191	191
	Sig. (2-code)	0.000	0.000		0.000
	N	191	191	191	191
Left knee second observer measurement 1	Pearson correlation	0.790**	0.954**	0.815**	0.964**
	Sig. (2-code)	0.000	0.000	0.000	0.000
	N	191	191	191	191
	Sig. (2-code)	0.000	0.000	0.000
	N	191	191	191	191

Interobserver correlations
		Right knee first observer	Left knee first observer	Right knee second observer	Left knee second observer
Right knee first observer	Pearson correlation	1	0.807**	0.969**	0.810**
	Sig. (2-code)		0.000	0.000	0.000
	N	191	191	191	191
Left knee first observer	Pearson correlation	0.807**	1	0.819**	0.973**
	Sig. (2-code)	0.000		0.000	0.000
	N	191	191	191	191
Right knee second observer	Pearson correlation	0.969**	0.819**	1	0.835**
	Sig. (2-code)	0.000	0.000		0.000
	N	191	191	191	191
Left knee second observer	Pearson correlation	0.810**	0.973**	0.835**	1
	Sig. (2-code)	0.000	0.000	0.000
	N	191	191	191	191

**The correlation is statistically significant at the 0.001 level (2-code)