Adherence to the DASH diet , compared with the control diet , resulted in a significant decrease in weight ( -4.4 versus -1.5 kg ; P < 0.001 ) and body mass index ( -1.7 versus -0.6 kg/m ( 2 ) ; P < 0.001 ) , decreased serum triglycerides ( -10.0 versus +19.2 mg/dL ; P interaction = 0.005 ) and very-low-density lipoprotein cholesterol levels ( -2.0 versus +3.9 mg/dL ; P interaction = 0.005 ) .