The Egyptian Heart Journal

Table 4 Correlation coefficient and covariance results in interobserver and intraobserver variability revealing strong agreement of measurements

From: Gender differences in two-dimensional and three-dimensional speckle tracking echocardiography left ventricular measurements among healthy preschool pediatric population

Examiner 1 at 1 week interval						Examiner 2 at 24 h interval
2D GLS	Examiner 1 at baseline	Corr. Coeff			0.998	2D GLS	Ex1_1	Corr. Coeff			0.992
		p			< 0.001			p			< 0.001
		Covariance			3.209			Covariance			3.097
			95% CI	Lower	0.996				95% CI	Lower	0.984
				Upper	0.999					Upper	0.997
3D GLS	Examiner 1 at baseline	Corr. Coeff			0.968	3D GLS	Ex1_1	Corr. Coeff			0.938
		p			< 0.001			p			< 0.001
		Covariance			2.274			Covariance			2.368
			95% CI	Lower	0.913				95% CI	Lower	0.875
				Upper	1					Upper	0.974

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