| Study | Reason for exclusion |
|---|---|
| Acar 2008 | Only 17 participants followed up for longer than 12 months |
| Alemany‐Rosales 2011 | No seizure outcome data reported |
| Alpherts 2008 | Only 6 months of follow‐up reported |
| Andersson‐Roswall 2010 | No seizure outcome data reported |
| Asadi‐Pooya 2008 | Study of postoperative antiepileptic drug treatment rather than seizure outcome of surgery |
| Bauer 2007 | Fewer than 30 participants included |
| Baxendale 2005 | No seizure outcome data reported |
| Bell 2010 | No seizure outcome data reported |
| Binder 2009 | Minimum 4 months of follow‐up reported; unknown number followed up for 1 year |
| Bindu 2018 | Fewer than 30 surgical participants included |
| Boesebeck 2002 | Subset of participants reported in Boesebeck 2007 |
| Boshuisen 2012 | Only those with 12 postoperative months seizure‐free reported |
| Bourgeois 2007 | Fewer than 30 participants included |
| Buckingham 2010 | Only participants with postoperative seizures included in the study |
| Busch 2011 | Only 5 to 7 months of postoperative follow‐up reported |
| Caicoya 2007 | Fewer than 30 participants included |
| Carne 2004 | No seizure outcome data reported |
| Cascino 1996 | Same participants reported as in Cascino 1995; more relevant information provided in Cascino 1995 |
| Chang 2007 | Unknown proportion in the study followed up for less than 1 year |
| Choi 2004b | No follow‐up period defined for the study |
| Cohen‐Gadol 2003 | Unknown proportion in the study followed up for less than 1 year |
| Colonnelli 2012 | No follow‐up period defined for the study |
| Coutin‐Churchman 2012 | No follow‐up period defined for the study |
| CTRI/2018/07/015007 | Does not randomise surgical interventions; randomises stereoencephalography or no stereoencephalography as part of pre‐surgical evaluation |
| Cukiert 2009 | Fewer than 30 participants included |
| D'Angelo 2006 | Unknown proportion in the study followed up for less than 1 year |
| D'Argenzio 2011 | No seizure outcome data reported |
| da Costa‐Neves 2012 | Study follow‐up 6 months |
| Danielsson 2009 | Fewer than 30 participants included |
| Datta 2009 | Fewer than 30 participants included |
| Dulay 2006 | Follow‐up period less than 12 months reported |
| Dulay 2009 | Postoperative follow‐up period less than 12 months reported for most participants |
| Elsharkawy 2008b | Subset of participants from Elsharkawy 2009a reported |
| Elsharkawy 2009b | Questionnaire follow‐up study with no seizure outcome data |
| Elsharkawy 2011b | Only children not seizure‐free 6 months postoperatively reported |
| Engel Jr 2012 | Fewer than 30 surgical participants included |
| Fauser 2008 | No seizure outcome data reported |
| Ferrari‐Marinho 2012 | No postoperative follow‐up period defined for the study |
| Ferroli 2006 | Unknown proportion of participants followed up for less than 12 months |
| Freitag 2005 | Study follow‐up defined as 6 to 12 months |
| Ghacibeh 2009 | Study follow‐up period not defined |
| Griffin 2007 | No seizure outcome data reported |
| Grunert 2003 | No duration of outcome; surgery not performed for epilepsy (surgery for tumours) |
| Haegelen 2013 | Fewer than 30 participants in the study with 12‐month follow‐up |
| Harvey 2008 | Study follow‐up 6 months |
| Hellwig 2012 | Follow‐up less than 12 months |
| Helmstaedter 2004 | Reported 3 months of follow‐up |
| Helmstaedter 2011 | Subset of participants from Schramm 2011 (results from a single centre of Schramm 2011) reported |
| Hervas‐Navidad 2002 | Some participants followed up for only 6 months; no seizure outcome data reported for some participants |
| Hildebrandt 2005 | No seizure outcome data reported |
| Hu 2012 | Unknown proportion of participants followed up for less than 12 months |
| Jehi 2010 | Only those who experienced postoperative seizures included |
| Junna 2013 | Seizure outcome not measured at 1 year for all participants; not possible to separate analyses |
| Kuzniecky 1996 | Same participants reported as in Kuzniecky 1993; more relevant information provided in Kuzniecky 1993 |
| Lach 2010 | Case control design (participants selected based on seizure outcome) inappropriate for this review |
| Lachhwani 2003 | Commentary on Wiebe 2001 provided |
| Lee 2010 | Fewer than 30 participants included |
| Limbrick 2009 | Unknown proportion of participants followed up for less than 12 months |
| Lodenkemper 2007 | Seizure outcome data reported for fewer than 30 participants |
| Lutz 2004 | No seizure outcome data reported |
| Malla 1998 | Same participants reported as in Cascino 1995; more relevant information provided in Cascino 1995 |
| McClelland 2007 | No seizure outcome data reported |
| McClelland 2011 | No seizure outcome data reported |
| Mikati 2004 | Fewer than 30 participants included |
| Mohammed 2012 | MRI scans obtained for less than 90% |
| Moien‐Afshari 2009 | Fewer than 30 participants included |
| NCT03643016 | Does not randomise surgical interventions; randomises Virtual Epilepsy Patient software or no Virtual Epilepsy Patient software as part of pre‐surgical evaluation |
| NCT03790280 | Does not randomise surgical interventions; randomises Intra‐operative electrocorticography or no Intra‐operative electrocorticography as part of pre‐surgical evaluation |
| Negishi 2011 | Fewer than 30 participants included |
| Nikase 2007 | Fewer than 30 participants included |
| Oertel 2004 | No seizure outcome data reported |
| Ogiwara 2010 | Unknown proportion of participants followed up for less than 12 months |
| Park 2010 | Seizure outcome rather than outcome after surgery measured following antiepileptic drug reduction |
| Placantonakis 2010 | Fewer than 30 participants included |
| Rocamora 2009 | Fewer than 30 participants included |
| Roth 2011 | Unknown proportion of participants followed up for less than 12 months |
| Sakuta 2005 | Fewer than 30 participants included |
| Schatlo 2015 | No seizure outcome data reported |
| Schwartz 2006 | Data reported only for participants who were seizure‐free at 12 months |
| Smyth 2007 | Unknown proportion of participants followed up for less than 12 months |
| Soeder 2009 | Fewer than 30 participants included |
| Stavem 2005 | No seizure outcome data reported |
| Stavem 2008 | No seizure outcome data reported |
| Stefan 2004 | Unknown proportion of participants followed up for less than 12 months |
| Stefan 2008 | Case‐control design (participants selected based on seizure outcome) inappropriate for this review |
| Teutonico 2008 | Fewer than 30 participants included |
| Tong 2015 | No seizure outcome data reported |
| Upchurch 2010 | Fewer than 30 participants included |
| Vachrajani 2012 | Unknown proportion of participants followed up for less than 12 months |
| Vadera 2012 | Unknown proportion of participants followed up for less than 12 months |
| Vadlamudi 2004 | Only seizure‐free participants included in the study |
| Vogt 2016 | No seizure outcome data reported |
| Wang 2016 | No seizure outcome data reported |
| Weinand 2001 | Same participants reported as in Weinand 1992; more relevant information given in Weinand 1992 |
| Wetjen 2006 | No seizure outcome data reported |
| Wetjen 2009 | Fewer than 30 participants included |
| Wieser 2003a | MRI scan obtained for less than 90% |
| Wieser 2003b | MRI scan obtained for less than 90% |
| Yasuda 2010a | No seizure outcome data reported |
| Yasuda 2010b | Fewer than 30 participants included |
| Zupanc 2010 | Unknown proportion of participants followed up for less than 12 months |
MRI: magnetic resonance imaging.