Table 2.
Characteristics of human randomized controlled trials
| First author | Year of publication | Country | Pressure | Procedure | Number of patients |
|---|---|---|---|---|---|
| Barczynski [2] | 2002 | Poland | 7 versus 12 | LC | 74 versus 74 |
| Basgul [13] | 2004 | Turkey | 10 versus 14–15 | LC | 11 versus 11 |
| Bogani [14] | 2014 | Italy | 8 versus 12 | LH | 20 versus 22 |
| Celik [15] | 2004 | Turkey | 8 versus 10 versus 12 versus 14 versus 16 | LC | 20 versus 20 versus 20 versus 20 versus 20 |
| Celik [16] | 2010 | Turkey | 8 versus 12 versus 14 | LC | 20 versus 20 versus 20 |
| Chok [17] | 2006 | China | 7 versus 12 | LC | 20 versus 20 |
| Dexter [18] | 1998 | UK | 7 versus 15 | LC | 10 versus 10 |
| Ekici [19] | 2009 | Turkey | 7 versus 15 | LC | 20 versus 32 |
| Emad Esmat [9] | 2006 | Egypt | 10 versus 14 | LC | 34 versus 37 |
| Eryilmaz [6] | 2011 | Turkey | 10 versus 14 | LC | 20 versus 23 |
| Gupta [20] | 2013 | India | 8 versus 14 | LC | 50 versus 51 |
| Hasukic [21] | 2005 | Bosnia-Herzegovina | 7 versus 14 | LC | 25 versus 25 |
| Ibraheim [7] | 2006 | Saudi Arabia | 6–8 versus 12–14 | LC | 10 versus 10 |
| Joshipura [22] | 2009 | India | 8 versus 12 | ||
| Kandil [23] | 2010 | Egypt | 8 versus 10 versus 12 versus 14 | LC | 25 versus 25 versus 25 versus 25 |
| Kanwer [24] | 2009 | India | 10 versus 14 | LC | 27 versus 28 |
| Karagulle [25] | 2008 | Turkey | 8 versus 12 versus 15 | LC | 14 versus 15 versus 15 |
| Koc [26] | 2005 | Turkey | 10 versus 15 | LC | 25 versus 25 |
| Morino [27] | 1998 | Italy | 10 versus 14 | LC | 10 versus 22 |
| Perrakis [28] | 2003 | Greece | 8 versus 15 | LC | 20 versus 20 |
| Polat [29] | 2003 | Turkey | 10 versus 15 | LC | 12 versus 12 |
| Sandhu [30] | 2009 | Thailand | 7 versus 14 | LC | 70 versus 70 |
| Sarli [31] | 2000 | Italy | 9 versus 13 | LC | 46 versus 44 |
| Schietroma [8] | 2013 | Italy | 6–8 versus 12–14 | LNF | 33 versus 35 |
| Sefr [32] | 2003 | Czech Republic | 10 versus 15 | LC | 15 versus 15 |
| Singla [33] | 2014 | India | 7–8 versus 12–14 | LC | 50 versus 50 |
| Sood [34] | 2006 | India | 8–10 versus 15 | LA | 5 versus 4 |
| Topal [35] | 2011 | Turkey | 10 versus 13 versus 16 | LC | 20 versus 20 versus 20 |
| Torres [36] | 2009 | Poland | 6–8 versus 10–12 | LC | 20 versus 20 |
| Umar [37] | 2011 | India | 8–10 versus 11–13 versus 14 | LC | Unclear |
| Vijayaraghavan [38] | 2014 | India | 8 versus 12 | LC | 22 versus 21 |
| Wallace [39] | 1997 | UK | 7.5 versus 15 | LC | 20 versus 20 |
| Warlé [40] | 2013 | the Netherlands | 7 versus 12 | LDN | 10 versus 10 |
| Yasir [41] | 2012 | India | 8 versus 14 | LC | 50 versus 50 |
LA laparoscopic adrenalectomy, LC laparoscopic cholecystectomy, LDN laparoscopic donor nephrectomy, LH laparoscopic hysterectomy, LNF Laparoscopic nissen fundoplication