borderline significantP = 0.054
BMI at baseline was significantly correlated with SBP day SD ( r = 0.09, P = 0.04), SBP night SD ( r = 0.20, P < 0.001) and DBP night SD ( r = 0.19, P < 0.001), and had a borderline significant correlation with DBP day SD ( r = 0.09, P = 0.054).