In a multivariate model , mean ICA-IMT progressed in the control diet group ( mean [ 95 % confidence interval ] , 0.052 mm [ -0.014 to 0.118 mm ] ) , whereas it regressed in the MedDiet + nuts group ( -0.084 mm [ -0.158 to -0.010 mm ] ; P = 0.024 versus control ) .