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. 2021 Feb 3;11:2899. doi: 10.1038/s41598-021-82568-8

Table 2.

correlation parameters for VEGF-A staining and CD34, CD68, SMA and Von Kossa staining.

Characteristic	Culprit specimens, n (%)	Non-culprit specimens, n (%)	Chi square tests of independence^a
CD34 stain	15/15 (100%)	0/6	χ² (1) = 10.313 p = 0.001 ϕ = 0.829 n = 21
CD68 stain	15/17 (88%)	1/4 (25%)	χ² (4) = 11.030 p = 0.026 ϕ = 0.606 n = 21
SMA stain^b	2/17 (11%)	6/6 (100%)	χ² (4) = 11.341 p = 0.023 ϕ = 0.870 n = 23
Von Kossa stain	16/22 (72%)	3/6 (50%)	χ² (1) = 1.116 p = 0.291 ϕ = 0.200 n = 28

^aThe Chi Square tests of independence were calculated based on the VEGF-A ROIs found in the specimens and the intensity of the various stainings in those ROIs. The asymptomatic plaque was not taken into account.

^bFor the association between SMA and VEGF-A staining, an inverse Chi Square test was used.