Most devastatingly, however, there are no randomized, double-blinded placebo controlled clinical trials that compare the success of quitting smoking by using smokeless tobacco versus using a placebo.
The results indicated that in intervention group the diet sodium decreased. The diet potassium increased, smoking rate decreased and the people who controlled the total diet amount increased.
结果表明：干预组对象膳食钠减少、膳食钾增加、吸烟人数下降、控制食物总摄入量人数上升；
3
The same results were obtained when the smoking factor was controlled.