After 6 months , the levels of IL-1Ra and IL-6 were significantly lower in the LCD group than in the LFD group , 978 ( 664-1385 ) versus 1216 ( 974-1822 ) pg/mL and 2.15 ( 1.65-4 .27 ) versus 3.39 ( 2.25-4 .79 ) pg/mL , both P < 0.05 .