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Table 1 Demographic characteristics of included studies

From: Outcomes of implants placed after osteotome sinus floor elevation without bone grafts: a systematic review and meta-analysis of single-arm studies

S.L.no. Author Year Country Centers Surgeons Study design Sample size Gender Age range Smokers
1 Leblebicioglu et al. [10] 2005 Turkey 1 NR Randomized controlled clinical trial 40 21F, 19M 46.7 years Yes
2 Jurisic et al. [11] 2008 Serbia 1 2 Retrospective cohort 33 26F, 35M 38–64 years NR
3 Schmidlin et al. [12] 2008 Switzerland 1 2 Retrospective cohort 24 15F, 9M 61.9 ± 10.3 years NR
4 Gabbert et al. [13] 2009 Germany 1 2 Prospective clinical study 36 20F, 16F 20–76 years No
5 Nedir et al. [14] 2009 Switzerland 1 2 Prospective clinical study 32 NR 39–82 years NR
6 Pjetursson et al. [15] 2009 Switzerland 1 NR Prospective clinical study 181 NR 17–90 years No
7 Lai et al. [16] 2010 Switzerland 1 NR Clinical trial 202 NR 20–68 years NR
8 Nedir et al. [17] 2010 Switzerland 1 NR Prospective clinical study 17 14F, 3M 38–69 years NR
9 Fornell et al. [21] 2011 Sweden 1 NR Prospective clinical study 14 7M, 7F 34–75 years NR
10 He et al. [23] 2011 China NR NR Retrospective cohort 22 10F, 12M 19–70 years NR
11 Senyilmaz et al. [18] 2011 Turkey NR NR Pilot study 17 9F, 8M 55 years Yes
12 Volpe et al. [25] 2011 Sweden NR NR Retrospective cohort 20 15F, 5M 48 years NR
13 Zahran et al. [22] 2011 Egypt NR NR Prospective clinical study 64 34F, 30M 35–72 years NR
14 Bruschi et al. [19] 2012 Italy 1 1 Retrospective cohort 46 29F, 17M 26–83 years NR
15 Fermergard et al. [20] 2012 Sweden NR NR Retrospective cohort 36 NR 64 ± 12 years NR
16 Si et al. [24] 2013 China 1 NR Randomized controlled clinical trial 20 NR ≥ 18 years NR
17 Brizuela et al. [26] 2014 Spain 1 1 Prospective clinical trial 37 22F, 15M 31–68 years Yes
18 Gu et al. [31] 2016 China 1 NR Prospective clinical study 28 13F, 15M 19–78 years NR
19 Nedir et al. [27] 2014 Switzerland 1 NR Case series 7 NR 47.5 ± 18.4 years NR
20 Bassi et al. [28] 2015 Sweden 1 NR Prospective clinical study 17 NR NR NR
21 Markovic et al. [32] 2015 Serbia 2 NR Prospective clinical trial 45 NR 18–56.7 years NR
22 Nedir et al. [33] 2016 Switzerland 1 NR Prospective clinical study 17 14F, 3M 38–69 years NR
23 Spinelli et al. [29] 2015 Switzerland 1 NR Prospective clinical study 39 17F, 12M 33–76 years Yes
24 French et al. [30] 2016 Canada NR NR Retrospective cohort 541 279F, 262M 18–88 years NR
25 Nedir et al. [38] 2017 Switzerland 1 NR Randomized controlled clinical trial 9 NR 57.6 ± 4.7 years NR
26 Si et al. [34] 2016 China 1 NR Retrospective cohort 80 37F, 43M 25–70 years Yes
27 Zill et al. [35] 2016 Germany 1 NR Retrospective cohort study 113 NR 31–84 years NR
28 Caban et al. [36] 2017 Sweden 1 1 Retrospective cohort 25 11F, 14M 44–84 years Yes
29 Cheng et al. [37] 2017 China NR NR Prospective clinical study 29 13F, 35M 43–71 years NR
30 Abi Najm et al. [39] 2018 Switzerland NR NR Prospective clinical study 17 14M, 3F 38–69 years Yes
31 Yang J et al. [40] 2018 China 1 1 Retrospective cohort 40 19F, 21M 22–70 years NR
32 Merheb et al. [7] 2019 Switzerland 1 NR Prospective clinical study 12 9F, 3M 57.6 ± 4.7 years NR
33 Qian et al. [8] 2020 China 1 NR Randomized controlled clinical trial 22 NR ≥ 18 years Yes
34 Rawat et al. [4] 2019 India NR NR Randomized controlled clinical trial 21 NR NR NR
35 Nahlieli et al. [41] 2019 Turkey NR NR Retrospective study 331 NR NR NR
  1. NR not reported, M male, F female