Table 2 The participation and CCR of ECA branches after direct bypass.

	E-S group (n = 44)	S-S group (n = 40)	P
ECA Branches participation in Postoperative revascularization, n [%]
STA-frontal branch	11[25.0]	15[37.5]	0.216
STA-parietal branch	36[83.7]	36[90.0]	0.399
PAA	1[2.3]	1[2.5]	0.946
OA	25[56.8]	35[87.5]	0.002**
DTA	29[65.9]	27[67.5]	0.877
MMA	32[72.7]	34[85.0]	0.171
Post/pre-operational diameter change, mean ± sd
STA-trunk	1.20 ± 0.37	1.29 ± 0.31	0.243
STA-frontal branch	1.04 ± 0.53	1.26 ± 0.43	0.038*
STA-parietal branch	1.42 ± 0.62	1.40 ± 0.49	0.838
PAA	1.07 ± 0.27	1.07 ± 0.25	0.986
OA	1.05 ± 0.18	1.13 ± 0.20	0.056
DTA	1.12 ± 0.25	1.09 ± 0.19	0.589
MMA	1.00 ± 0.30	1.07 ± 0.20	0.238

	E-S group with Poor grade (n = 16)	S-S group with Poor grade (n = 17)	P	E-S group with Good grade (n = 28)	S-S group with Good grade (n = 23)	P
ECA Branches participation in Postoperative revascularization, n [%]
STA-frontal branch	1[6.7]	10[58.8]	0.001**	10[35.7]	5[21.7]	0.276
STA-parietal branch	11[73.3]	13[76.5]	0.838	25[89.3]	23[100]	0.106
PAA	0[0]	1[5.9]	0.325	1[3.6]	0[0]	0.36
OA	6[37.5]	14[82.4]	0.008**	19[67.9]	21[91.3]	0.053
DTA	8[50.0]	8[47.1]	0.866	21[75.0]	19[82.6]	0.511
MMA	9[56.3]	14[82.4]	0.103	23[82.1]	20[87.0]	0.638
Post/pre-operational diameter change, mean ± sd
STA-trunk	0.989 ± 0.489	1.196 ± 0.291	0.147	1.322 ± 0.212	1.359 ± 0.320	0.623
STA-frontal branch	0.798 ± 0.494	1.163 ± 0.168	0.012*	1.18 ± 0.50	1.330 ± 0.540	0.299
STA-parietal branch	0.945 ± 0.719	0.967 ± 0.351	0.911	1.694 ± 0.328	1.714 ± 0.290	0.820
PAA	1.023 ± 0.242	1.010 ± 0.311	0.895	1.099 ± 0.278	1.115 ± 0.195	0.817
OA	0.941 ± 0.216	1.133 ± 0.257	0.027*	1.117 ± 0.126	1.134 ± 0.145	0.656
DTA	1.160 ± 0.307	1.199 ± 0.183	0.658	1.094 ± 0.205	1.013 ± 0.145	0.117
MMA	0.969 ± 0.302	1.149 ± 0.256	0.074	1.022 ± 0.295	1.010 ± 0.128	0.857

E-S end–side bypass, S-S side–side bypass, STA superficial temporal artery, PAA posterior auricular artery, OA occipital artery, DTA deep temporal artery, MMA middle meningeal artery. *P < 0.05, **P < 0.01.

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