At the end of follow-up , participants who received magnesium chloride showed higher serum magnesium levels ( 0.86 0.08 vs. 0.69 0.16 mmol/L , p = 0.002 ) and lower hsCRP levels ( 4.8 15.2 vs. 17.1 21.0 nmol/L , p = 0.01 ) compared with participants in the control group .