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Table 4: 
Association between signal intensity ratio of carotid IPH and the presence of ipsilateral ACI lesions
SIRIPH-to-muscle on MR ImagePresence of ACI
Univariate RegressionMultivariate Model 1aMultivariate Model 2aMultivariate Model 3a
OR95% CIPbOR95% CIPbOR95% CIPbOR95% CIPb
T1-weighted4.081.34–12.40.0133.341.08–10.31.0363.120.96–10.11.0581.570.48–5.20.458
TOF1.980.80–4.93.1412.540.94–6.82.0652.700.90–8.13.0771.210.37–3.93.756
MPRAGE0.860.51–1.45.5610.850.48–1.48.5570.980.53–1.79.9410.560.28–1.12.101
  • Note:—SIRIPH-to-muscle indicates the maximum signal intensity of carotid IPH/the mean signal intensity of the sternocleidomastoid muscle.
  • ↵a Multivariate model 1 was adjusted for age, sex, and history of smoking; model 2 was further adjusted using model 1 and total luminal occlusion of the carotid artery. Model 3 was further adjusted using model 1 and the volume of carotid IPH and LRNC.
  • ↵b Associations between patients with and without ipsilateral ACI lesions were assessed using the OR values.