Table 3.
Characteristic of eligible studies.
| Author | Year | Duration of Study | Country | Type of Study | Population | Time of Follow Up | Definition of LSR Resolution | Definition of HFS Relief |
|---|---|---|---|---|---|---|---|---|
| Eckardstein [17] | 2013 | 2000–2010 | Germany | Retrospective Study | 38 | 1-year | Complete disappearance | Complete elimination of symptoms |
| El Damaty [18] | 2016 | 2013–2015 | Germany | Prospective Study | 100 | 1-year | Total or partial relief | ≥90% improvement |
| Hatem [19] | 2001 | N/A | France | Prospective Study | 33 | 3-month, >1 year | Complete disappearance | Complete elimination of symptoms |
| Huang [16] | 2017 | 2013–2015 | China | Retrospective Study | 1138 | 1-day, 3-month, 1-year | Complete disappearance | Symptoms improved >75% |
| Isu [20] | 1996 | Undefined | Japan | Prospective Study | 40 | 1-day, >1 year | Complete disappearance | Complete elimination of symptoms |
| Jo [21] | 2012 | 1997–2007 | South Korea | Retrospective Study | 801 | >1 year | Complete disappearance | Less than complete elimination of symptoms |
| Joo [22] | 2007 | 2001–2005 | South Korea | Retrospective Study | 72 | 1-week, 6-month | Complete disappearance | Complete elimination of symptoms |
| Kiya [23] | 2001 | 1998–1999 | Japan | Prospective Study | 38 | 1-day, 3-month | Complete disappearance | Complete elimination of symptoms |
| Kong [24] | 2007 | 2000–2005 | South Korea | Retrospective Study | 263 | 1-week, 3-month, 1-year | Complete disappearance | Complete elimination of symptoms |
| Lee [25] | 2016 | 2009–2013 | South Korea | Retrospective Study | 885 | 1-day, 6-month, 1-year | Complete disappearance | Complete elimination of symptoms |
| Li [26] | 2012 | 2006–2007 | China | Prospective Study | 104 | >1 year | Complete disappearance | Undefined |
| Liu [27] | 2017 | 2010–2014 | China | Retrospective Study | 332 | 1-day, >1 year | Amplitude decreased >50% of baseline | Symptoms improved >75% |
| Shin [28] | 1997 | 1985–1994 | South Korea | Prospective Study | 132 | 6-month | Undefined | Complete elimination of symptoms |
| Song [15] | 2019 | 2013–2016 | China | Retrospective Study | 73 | 1-week, 1-year | Amplitude decreased >50% of baseline | Complete elimination of symptoms |
| Thirumala [29] | 2015 | 2000–2007 | USA | Retrospective Study | 235 | Immediate post-surgery, discharge, >1 year | Complete disappearance | Less than complete elimination of symptoms |
| Thirumala [30] | 2011 | 2000–2007 | USA | Retrospective Study | 259 | Immediate post-surgery, discharge, >1 year | Complete disappearance | Less than complete elimination of symptoms |
| Tobishima [31] | 2013 | 2005–2009 | Japan | Retrospective Study | 131 | 1-week, 1-year | Complete disappearance | Complete disappearance or occasional slight spasm |
| Wei [32] | 2018 | 2013–2014 | China | Prospective Study | 145 | 1-week, 1-year | Complete disappearance | Symptoms improved ≥90% |
| Yamashita [33] | 2005 | 1994–2001 | Japan | Retrospective Study | 60 | 1-day, >1 year | Complete disappearance | Complete elimination of symptoms |
| Ying [34] | 2011 | 2010 | China | Retrospective Study | 241 | 1-day, 3-month, 6-month | Complete disappearance | Symptoms improved >75% |
| Zhang [35] | 2017 | 2014–2016 | China | Retrospective Study | 1172 | 1-day, 3-month | Amplitude decreased >50% of baseline | Complete disappearance or occasional slight spasm |
| Zhu [36] | 2019 | 2015–2017 | China | Prospective Study | 112 | 6-month | Complete disappearance | Undefined |