After controlling for significant variables in the univariate analyses , multivariate linear regression models found that old age ( = -0.288 , p = 0.001 ) , low triglyceride ( = 0.194 , p = 0.027 ) , periventricular WMC ( PVWMC ) ( = -0.392 , p < 0.001 ) and presence of thalamic microbleed ( = -0.197 , p = 0.041 ) were independently predictive of less cGM volume ratio .