Table 2 Patient characteristics
Total no. of patients | 80,410 | Â |
Mean, Median sample size | 181, 118 | Â |
Mean % female | 72 | Â |
|  | No. of studies (n = 444) * | Percentage of studies |
Age category | Â | Â |
Children only (aged <18Â yr) | 75 | 16.89 |
Adults only (aged ≥18 yr to ≤65 yr) | 262 | 59.01 |
Children and adults (aged ≤65 yr) | 17 | 3.83 |
Adults and elderly (aged ≥18 yr) | 76 | 17.12 |
All ages | 9 | 2.03 |
Not reported | 5 | 1.13 |
American Society of Anesthesiologists (ASA) physical status | Â | Â |
I | 15 | 3.38 |
I or II | 266 | 59.91 |
I or II or III | 87 | 19.59 |
II or III | 4 | 0.90 |
Not reported | 72 | 16.22 |
Surgery type | Â | Â |
Obstetric and gynecological | 134 | 30.18 |
Gastrointestinal | 51 | 11.49 |
Eye | 35 | 7.88 |
General dentistry, oral and maxillofacial surgery, and orthodontics | 35 | 7.88 |
Otolaryngological | 20 | 4.50 |
Breast | 18 | 4.05 |
Orthopedic | 16 | 3.60 |
Neurological | 15 | 3.38 |
Endocrine | 9 | 2.03 |
Cardiovascular | 3 | 0.68 |
Urological | 1 | 0.23 |
Miscellaneous (includes multiple surgery types, abdominal surgery, and plastic surgery unspecified) | 103 | 23.20 |
Not reported | 4 | 0.90 |
History of motion sickness | Â | Â |
Yes | 147 | 33.11 |
No or not reported | 297 | 66.89 |
History of postoperative nausea and vomiting | Â | Â |
Yes | 197 | 44.37 |
No or not reported | 247 | 55.63 |
Comorbidities ** | Â | Â |
Not reported | 415 | 93.47 |
Diabetes mellitus | 9 | 2.03 |
Cardiovascular | 8 | 1.80 |
Obesity | 5 | 1.13 |
Cancer | 4 | 0.90 |
Migraines | 3 | 0.68 |
Gallbladder | 2 | 0.45 |
Liver disease | 2 | 0.45 |
Asthma | 1 | 0.23 |
Disorder of the ear | 1 | 0.23 |
Mental health | 1 | 0.23 |
Osteoarthritis | 1 | 0.23 |
Urological | 1 | 0.23 |