Table 1 Excluded studies
Excluded studies | Reason for exclusion | Reason group |
|---|---|---|
Akincibay 2008 [34] | Doxicyclin in the control group | 2 |
Carvalho 2005 [35] | No PPD data presentation as means ± standard deviation | 1 |
Cionca 2010 [36] | No PPD data presentation as means ± standard deviation | 1 |
Ehmke 2003 [37] | No PPD values given before and after treatment | 1 |
Ehmke 2005 [38] | No PPD data presentation as means ± standard deviation | 1 |
Eickholz 2013 [39] | no adequate control group | 2 |
Eisenberg 1991 [40] | short term evaluation (after 3 weeks) | 5 |
Flemmig 1998 [42] | No PPD data presentation as means ± standard deviation | 1 |
Griffiths [55] | no adequate control group | 2 |
Guerrero [34] | No PPD data presentation as means ± standard deviation | 1 |
Haffajee [44] | Administration of metronidazole only | 3 |
Haffajee 2008 [43] | Administration of metronidazole only | 3 |
Hartmann 1986 [44] | Administration of metronidazole only | 3 |
Hernandez 1987 [45] | No PPD data presentation as means ± standard deviation | 1 |
Jenkins 1989 [46] | no adequate control group | 2 |
Joyston 1984 [47] | Administration of metronidazole only | 3 |
Joyston 1986 [48] | Administration of metronidazole only | 3 |
Lindhe 1982 [49] | no adequate control group | 2 |
Loesche 1987 [50] | Administration of metronidazole only | 3 |
Loesche [35] | Administration of metronidazole only | 3, 4 |
Surgical intervention | ||
Loesche 1992 [51] | Administration of metronidazole only | 1, 3 |
No PPD data presentation as means ± standard deviation | ||
Loesche 1993 [52] | Administration of metronidazole only | 1, 3 |
No PPD data presentation as means ± standard deviation | ||
Lu 2012 [53] | No PPD data presentation as means ± standard deviation | 1 |
Lundstrom 1984 [54] | no adequate control group | 2 |
Magnusson 1984 [8] | No administration of metronidazole | 3 |
Administration of retraction chord, PrefGel® and PGA | 1 | |
Moreira 2007 [85] | No group without antibiotics | 2 |
Müller 1986 [86] | Administration of metronidazole only | 3 |
Noyan 1997 [87] | no adequate control group | 2 |
Palmer 1998 [88] | Administration of metronidazole only | 3 |
Palmer 1999 [89] | Administration of metronidazole only | 3 |
Re 1988 [90] | No administration of metronidazole | 3 |
Sigusch 2000 [56] | no adequate control group | 2 |
Sigusch 2001 [57] | no adequate control group | 2 |
Soder 1990 [91] | Administration of metronidazole only | 3 |
Soder 1999 [61] | Surgical intervention | 4 |
Sterry 1985 [92] | Surgical intervention | 4 |
Tinoco 1998 [93] | Surgical intervention | 4 |
Varela 2011 [94] | Same data as Heller [45] | - |
Vergani 2004 [95] | no adequate control group | 2 |
Winkel [48] | Administration of metronidazole only | 3 |
Studies not appliable to the meta-analysis | ||
Berglundh 1998 [62] | 5 | |
Carvalho 2004 [63] | 1 | |
Casarin 2012 [96] | 1 | |
Goodson/Mdala 2012 [97] | 1 | |
Haffajee [44] | 1 | |
Moeintaghavi [38] | 5 | |
Ribeiro [39] | 1 | |
Rooney [46] | 1 |