| Study | Reason for exclusion |
|---|---|
| Ardehali 2008 | INTERVENTION: treatment with antibiotics, and is relevant for another review in this suite (Mulvaney 2022a) |
| Becker 1992 | ALLOCATION: not randomised |
| Black 1986 | PARTICIPANTS: wrong patient population ‐ participants did not have OME for at least 3 months duration |
| Black 1990 | PARTICIPANTS: unknown duration of OME |
| Brown 1978 | PARTICIPANTS: unknown duration of OME |
| Bulman 1984 | PARTICIPANTS: wrong patient population |
| Casselbrant 2009 | PARTICIPANTS: had RAOM as well as OME |
| Choung 2008 | INTERVENTION: treatment with steroids, and is relevant for another review in this suite (Mulvaney 2022b) |
| El Begermy 2022 | INTERVENTION: treatment with ventilation tubes, and is relevant for another review in this suite (MacKeith 2022a) |
| Elkholy 2021 | INTERVENTION: treatment with ventilation tubes, and is relevant for another review in this suite (MacKeith 2022a) |
| Ferrara 2005 | PARTICIPANTS: had RAOM |
| Gibson 1996 | ALLOCATION: not randomised |
| Hammaren‐Malmi 2005 | PARTICIPANTS: did not have OME of at least 3 months duration |
| Hornigold 2008 | ALLOCATION: not randomised |
| Iino 1989 | ALLOCATION: not randomised |
| Kujala 2012 | PARTICIPANTS: participants had RAOM |
| Le 1991 | COMPARISONS: wrong comparison |
| Mandel 1992 | PARTICIPANTS: wrong patient population |
| Marchisio 1998 | INTERVENTION: treatment with antibiotics, and is relevant for another review in this suite (Mulvaney 2022a) |
| Markou 2004 | PARTICIPANTS: unknown duration of OME |
| Mattila 2003 | PARTICIPANTS: had AOM |
| Maw 1993 | INTERVENTION: patients had adenotonsillectomy |
| Maw 1999 | INTERVENTION: treatment with ventilation tubes, and is relevant for another review in this suite (MacKeith 2022a) |
| MRC Multicentre Otitis Media Study 2004 | ALLOCATION: not randomised |
| NCT00629694 | PARTICIPANTS: unknown duration of OME |
| NCT04302337 | INTERVENTION: comparing two types of adenoidectomy |
| NCT04584073 | INTERVENTION: treatment with ventilation tubes, and is relevant for another review in this suite (MacKeith 2022a) |
| Niemi 2015 | PARTICIPANTS: wrong patient population |
| Paradise 1980 | PARTICIPANTS: wrong patient population |
| Paradise 1990 | PARTICIPANTS: did not have OME |
| Paradise 1997 | ALLOCATION: not randomised |
| Parker 1989 | ALLOCATION: not randomised |
| Parlea 2012 | ALLOCATION: not randomised |
| Popova 2010 | INTERVENTION: treatment with ventilation tubes, and is relevant for another review in this suite (MacKeith 2022a) |
| Rohail 2006 | PARTICIPANTS: unknown duration of OME |
| Roydhouse 1980 | PARTICIPANTS: wrong patient population |
| Rynnel‐Dagoo 1978 | PARTICIPANTS: wrong patient population |
| Sagara 2003 | ALLOCATION: not randomised |
| Shishegar 2007 | PARTICIPANTS: wrong patient population |
| Shubich 1996 | ALLOCATION: not randomised |
| Stenstrom 2005 | ALLOCATION: not randomised |
| Sujatha 2015 | INTERVENTION: treatment with ventilation tubes, and is relevant for another review in this suite (MacKeith 2022a) |
| Tao 2020 | INTERVENTION: treatment with ventilation tubes, and is relevant for another review in this suite (MacKeith 2022a) |
| Velepic 2011 | INTERVENTION: treatment with ventilation tubes, and is relevant for another review in this suite (MacKeith 2022a) |
| Worley 2007 | ALLOCATION: not randomised |
AOM: acute otitis media; OME: otitis media with effusion; RAOM: recurrent acute otitis media