Table 1.
Characteristics of the included studies.
| Author and year | Country | Gender (M/F) | Sample size (T/C) | Intervention | Control | Dose | Main outcome |
|---|---|---|---|---|---|---|---|
| Sayin 2020 | Turkey | 42/58 | 50/50 | Epley maneuver + betahistine | Epley maneuver | 24 mg, twice times/d | DHI, efficiency rate |
| Jalali 2020 | Iran | 34/44 | 39/39 | Epley maneuver + betahistine | Epley maneuver | 16 mg, 3 times/d | DHI |
| Guneri 2012 | Turkey | NA | 24/26 | Epley maneuver + betahistine | Epley maneuver + placebo | 24 mg, twice times/d | DHI, efficiency rate |
| Muhammad 2021 | Pakistan | 38/56 | 47/47 | Epley maneuver + betahistine | Epley maneuver | 24 mg, twice times/d | Efficiency rate |
| Ugurlu 2012 | Turkey | NA | 20/20 | Epley maneuver + betahistine | Epley maneuver | 24 mg, twice times/d | Recurrence rate |
| İnan 2019 | Turkey | 23/25 | 24/24 | Epley maneuver + betahistine | Epley maneuver | 24 mg, twice times/d | DHI |
| Wang 2015 | China | 85/87 | 86/86 | Epley maneuver + betahistine | Epley maneuver + placebo | 12 mg, 3 times/d | Efficiency rate |
| Li 2021 | China | 66/84 | 75/75 | Epley maneuver + betahistine | Epley maneuver | 12 mg, 3 times/d | DHI, efficiency rate, recurrence rate |
| Hong 2012 | China | 42/86 | 67/61 | Epley maneuver + betahistine | Epley maneuver | 12 mg, 3 times/d | efficiency rate |
C = control, DHI = dizziness handicap inventory, F = female, M = male, T = treatment.