the ginger supplement intake group, which took not more than 1 g of ginger supplementation per day for above four days, had significantly less acute vomiting than the control group (OR 0.30; 95% CI 0.12 to 0.79; p = 0.02; I2 = 36%)

the incidence of acute nausea (p = 0.53), the incidence of delayed nausea (p = 0.31) ... were not significantly different between the ginger supplement intake group and the control group

the incidence of acute vomiting (p = 0.09), and the incidence of delayed vomiting (p = 0.89) were not significantly different between the ginger supplement intake group and the control group