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Figure 2 | Orphanet Journal of Rare Diseases

Figure 2

From: The main pulmonary artery in adults: a controlled multicenter study with assessment of echocardiographic reference values, and the frequency of dilatation and aneurysm in Marfan syndrome

Figure 2

The qnorm (Q-Q plot) plots the quantiles of MPA diameters (cm) of 123 normal adults against the quantiles of a normal distribution where the pattern of points in the plot is used to compare these two distributions. The plot identifies normal distribution with only a slight deviation from normality at the upper tail. The Shapiro-Wilk W test for normal data corroborates normal distribution of MPA diameters yielding W = 0.98330, V = 1.641, z = 1.111, and P = .133.

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Orphanet Journal of Rare Diseases

ISSN: 1750-1172