Table 2. Characteristics of included studies.
| Study Characteristic | N = 92 |
|---|---|
| Year of Publication | |
| 2012 (%) | 2 (2.2) |
| 2013 (%) | 0 (0.0) |
| 2014 (%) | 4 (4.4) |
| 2015 (%) | 1 (1.1) |
| 2016 (%) | 10 (10.9) |
| 2017 (%) | 13 (14.1) |
| 2018 (%) | 15 (16.3) |
| 2019 (%) | 29 (31.5) |
| 2020 (%) | 18 (19.6) |
| Journal with Impact Factor (2018 Impact Factor) * | |
| Acta Otolayngologica, 1.286 (%) | 3 (3.3) |
| American Journal of Rhinology & Allergy, 2.015 (%) | 1 (1.1) |
| Clinical Otolaryngology, 2.377 (%) | 3 (3.3) |
| European Archives of Oto-Rhino-Laryngology, 1.750 (%) | 8 (8.7) |
| Head & Neck, 2.442 (%) | 23 (25.0) |
| International Forum of Allergy & Rhinology, 2.521 (%) | 4 (4.4) |
| JAMA Otolaryngology–Head & Neck Surgery, 3.502 (%) | 17 (18.5) |
| Otolaryngology–Head and Neck Surgery, 2.310 (%) | 12 (13.0) |
| The Laryngoscope, 2.343 (%) | 21 (22.8) |
| Study Design | |
| Retrospective Cohort (%) | 83 (90.2) |
| Prospective Cohort (%) | 2 (2.2) |
| Case Control (%) | 7 (7.6) |
| Subspecialty | |
| General (%) | 7 (7.6) |
| Head & Neck Surgery (%) | 46 (50.0) |
| Laryngology (%) | 2 (2.2) |
| Otology (%) | 16 (17.4) |
| Rhinology (%) | 11 (12.0) |
| Thyroid (%) | 10 (10.9) |
| Presence of Statistician Co-Author | |
| Yes (%) | 44 (47.8) |
| No (%) | 36 (45.0) |
| Unknown (%) | 12 (12.4) |
| Median Initial Cohort Size (IQR) | 1438 (403–6900) |
| Matched Cohort Size (IQR) | 924 (218–3948) |
| Percent of Cohort Matched (%) | 50.6 (33.3–64.4) |
* The following journals did not return articles that fit our inclusion criteria
Rhinology, The Journal of Vestibular Research: Equilibrium & Orientation, Dysphagia, Ear and Hearing, Hearing Research, Journal of Vestibular Research, Trends in Hearing, JARO, Journal of Otolaryngology-Head & Neck Surgery, Otology & Neurotology, Audiology and Neurotology, International Journal of Audiology, European Archives of Oto-Rhino-Laryngology, Otolaryngologic Clinics of North America, Current Opinion in Otolaryngology & Head and Neck Surgery, Journal of the American Academy of Audiology, Journal of Voice, International Journal of Pediatric Otorhinolaryngology, and Trends in Amplification.