Table 3.

Important risk factors of Chemotherapy-Induced Nausea and Vomiting (CINV).

Risk factors	Number of studies confirmed the risk factor	Summary odds ratios (p < 0.05)	95% CI
History of CINV and/or Pregnancy-related Nausea/Vomiting	15	3.13	2.40–4.07
Sex = Female	18	2.79	2.26–3.44
Expectancy of CINV = Yes	6	2.61	1.69–4.02
Age = Younger	27	2.59	2.18–3.07
Anxiety = Yes	6	2.57	1.94–3.40
History of Morning Sickness = Yes	6	1.97	1.46–2.65
Alcohol = Low	12	1.94	1.68–2.24