Table 3.
Excluded studies
| Excluded studies | Reason for exclusion |
|---|---|
| Europerio 4 2003 [37) | Not addressing research question |
| Abstracts for the Royal Australian and New Zealand College of Psychiatrists 2005 [38] | Not addressing research question |
| 5th Joint Meeting of the European Tissue Repair Society and the Wound Healing Society 2009 [39] | Not addressing research question |
| Recently published abstracts [40] | Not addressing research question |
| DENTSPLY Posters 2012 [41] | Not addressing research question |
| HealthBeat 2007 [42] | Not addressing research question |
| Abstracts for Poster Presentations 2011 [43] | Not addressing research question |
| Abstracts for the International Symposium on Dental Hygiene 2013 [44] | Not addressing research question |
| Abou Sulaiman et al. 2010 [45] | Not addressing research question |
| Acharya et al. 2010 [46] | No PPD reduction data |
| Akpinar et al. 2013 [47] | Not addressing research question |
| Altay et al. 2013 [20] | No PPD reduction data |
| Armstrong et al. 2010 [48] | Not addressing research question |
| Arora et al. 2013 [49] | Not addressing research question |
| Basegmez et al. 2011 [50] | Not addressing research question |
| Bresolin et al. 2013 [51] | Not addressing research question |
| Bresolin et al. 2014 [52] | Not addressing research question |
| Caspersen et al. 2012 [53] | Not addressing research question |
| Caula et al. 2014 [54] | No comparison |
| Caula et al. 2014 [54] | Duplicate |
| Chapple et a. 2006 [55] | Not addressing research question |
| Chapple et al. 2007 [56] | Not addressing research question |
| Chandni et al. 2015 [57] | Not addressing research question |
| Chaston et al. 2014 [58] | Not addressing research question |
| Chee et al. 2008 [59] | Inclusion of diabetes |
| Chee et al. 2013 [60] | Missed intervention, inclusion of diabetes |
| Chen et al. 2012 [61] | Inclusion of diabetes |
| D’Aiuto et al. 2004 [62] | Not addressing research question |
| D’Aiuto et al. 2004 [63] | Not addressing research question |
| D’Aiuto et al. 2005 [23] | No comparison |
| D’Aiuto et al. 2006 [64] | Not addressing research question |
| Deppe et al. 2010 [65] | Not addressing research question |
| Dodington et al. 2015 [66] | No obesity data |
| Draper et al. 2010 [67] | Not addressing research question |
| Duan et al. 2009 [24] | Written in Chinese |
| Edwards et al. 2006 [68] | Not addressing research question |
| Efurd et al. 2012 [69] | Not addressing research question |
| Elliott-Smith et al. 2011 [70] | Not addressing research question |
| Engebretson et al. 2014 [71] | Not addressing research question |
| Fairfield et al. 2010 [72] | Not addressing research question |
| Fang et al. 2015 [73] | Inclusion of end-stage renal disease patients |
| Fentoglu et al. 2010 [74] | Statin intake |
| Fine et al. 2007 [75] | Not addressing research question |
| Fokkema et al. 2012 [76] | Not addressing research question |
| Fu et al. 2015 [77] | No comparison |
| Garcia et al. 2010 [78] | Not addressing research question |
| Giblin et al. 2014 [79] | Inclusion of prediabetes |
| Giblin et al. 2014 [79] | Duplicate |
| Gluch et al. 2007 [80] | Inclusion of diabetes |
| Goldie et al. 2002 [81] | Not addressing research question |
| Goldie et al. 2004 [82] | Not addressing research question |
| Goldie et al. 2005 [83) | Not addressing research question |
| Griffin et al. 2012 [84] | Not addressing research question |
| Gurenlian et al. 2006 [85] | Not addressing research question |
| Gurenlian et al. 2009 [86] | Not addressing research question |
| Hammaker et al. 2010 [87] | Not addressing research question |
| Horwitz et al. 2007 [88] | Not addressing research question |
| Hovliaras-Delozier et al. 2008 [89] | Not addressing research question |
| Ide et al. 2004 [90] | No obesity data |
| Ide et al. 2007 [91] | Not addressing research question |
| Iwamoto et al. 2003 [25] | Application of antibiotics |
| Jahn et al. 2004 [92] | Not addressing research question |
| Jahn et al. 2015 [93] | Not addressing research question |
| Jaiswal et al. 2015 [94] | No treatment (SRP) |
| Janket et al. 2014 [95] | Meta-analysis |
| Janket et al. 2014 [95] | Duplicate |
| Jared et al. 2008 [96] | Not addressing research question |
| Jared et al. 2008 [96] | Duplicate |
| Jiang et al. 2013 [97] | Not addressing research question |
| Kamil et al. 2011 [98] | No obesity data |
| Kamilov et al. 1998 [99] | Not addressing research question |
| Kapellas et al. 2013 [100] | No obesity data |
| Kardeşler et al. 2010 [26] | Inclusion of diabetes |
| Keller et al. 2015 [101] | Systematic review |
| Kiany et al. 2014 [102] | No obesity data |
| Kiany et al. 2015 [103] | Duplicate |
| Kipp et al. 2003 [104] | Not addressing research question |
| Kudva et al. 2010 [105] | Inclusion of diabetes |
| Kumar et al. 2015 [106] | Inclusion of diabetes |
| Kurti et al. 2007 [107] | Not addressing research question |
| Kurtis et al. 2007 [108] | Duplicate |
| Lee et al. 2014 [109] | Not addressing research question |
| Li et al. 2013 [110] | No obesity data |
| Ling et al. 2012 [111] | Inclusion of diabetes |
| Lo et al. 2011 [112] | Not addressing research question |
| Malhotra et al. 2012 [113] | No obesity data |
| Mancl et al. 2013 [114] | Not addressing research question |
| Martinez et al. 2014 [115] | Supplementation of ω-3 eicosapetaenoic acid |
| Martinez et al. 2014 [116] | One year of omega-3 supplementation |
| Matlock et al. 2012 [117] | No treatment (SRP) |
| McDaniel et al. 2013 [118] | Not addressing research question |
| Meharwade et al. 2014 [119] | Local drug delivery |
| Merchant et al. 2014 [120] | Inclusion of diabetes |
| Michalowicz et al. 2014 [121] | Inclusion of diabetes |
| Mizrak et al. 2006 [122] | Not addressing research question |
| Moeintaghavi et al. 2012 [123] | Inclusion of diabetes |
| Moravec et al. 2011 [124] | No treatment (SRP) |
| Muthu et al. 2015 [125] | No obesity data |
| Nassar et al. 2012 [126] | Inclusion of diabetes |
| Newton et al. 2011 [127] | Not addressing research question |
| Nichols et al. 2001 [128] | Not addressing research question |
| Nielsen et al. 2000 [129] | Not addressing research question |
| Novakovic et al. 2013 [130] | Not addressing research question |
| Novakovic et al. 2014 [131] | Not addressing research question |
| Oliveira et al. 2011 [132] | Not addressing research question |
| Olsen et al. 2006 [133] | Not addressing research question |
| Paquette et al. 2008 [134] | Not addressing research question |
| Perayil et al. 2014 [135] | No obesity data |
| Perayil et al. 2014 [136] | Duplicate |
| Phillips et al. 2013 [137] | Not addressing research question |
| Pradeep et al. 2007 [138] | Not addressing research question |
| Price et al. 2010 [139] | Not addressing research question |
| Qiqiang et al. 2012 [140] | No obesity data |
| Radafshar et al. 2012 [141] | Not addressing research question |
| Radnai et al. 2009 [142] | Not addressing research question |
| Raghavendra et al. 2012 [143] | Not addressing research question |
| Ramirez et al. 2011 [144] | No obesity data |
| Rasch et al. 1995 [145] | Not addressing research question |
| Sadatmansouri et al. 2006 [146] | Not addressing research question |
| Saffi et al. 2013 [147] | Inclusion of patients with coronary disease |
| Saffi et al. 2013 [147] | Duplicate |
| Saffi et al. 2014 [148] | Inclusion of patients with coronary artery disease |
| Shruti et al. 2010 [27] | No obesity data |
| Sembene et al. 2000 [149] | Not addressing research question |
| Sengupta et al. 1990 [150] | Not addressing research question |
| Sgolastra et al. 2013 [36] | Meta-Analysis |
| Shimada et al. 2010 [151] | No comparison |
| Shimoe et al. 2011 [152] | Case report |
| Singh et al. 2014 [153] | Not addressing research question |
| Siqueira et al. 2013 [154] | Not addressing research question |
| Stewart et al. 2001 [155] | Inclusion of diabetes |
| Talbert et al. 2006 [156] | Inclusion of diabetes |
| Tamaki et al. 2009 [157] | No obesity data |
| Tamaki et al. 2011 [158] | No obesity data |
| Tawfig et al. 2015 [159] | No comparison |
| Teles et al. 2012 [160] | No comparison |
| Toker et al. 2012 [161] | Not addressing research question |
| Tuter et al. 2007 [162] | Inclusion of patients with systemic disease |
| Vardar et al. 2003 [163] | Not addressing research question |
| Van Dyke et al. 2015 [164] | Not addressing research question |
| Vyas et al. 2000 [165] | Not addressing research question |
| Wahid et al. 2013 [166] | Not addressing research question |
| Wang et al. 2013 [167] | Inclusion of aggressive periodontitis |
| Wehmeyer et al. 2013 [168] | Not addressing research question |
| Wei et al. 2010 [169] | No obesity data |
| Williams et al. 2007 [148] | No obesity data |
| Williams et al. 2009 [170] | Not addressing research question |
| Williams et al. 2009 (171] | Not addressing research question |
| Wood et al. 2006 [172) | Not addressing research question |
| Wu et al. 2015 [173) | Not addressing research question |
| Zare et al. 2014 [174) | Not addressing research question |
| Zhou et al. 2013 [175] | Inclusion of patients with systemic disease |
| Zuza et al. 2011 [176) | No PPD reduction data |