Table 4 Quality of each included study by the Newcastle Ottawa Scale
From: Gut microbiota in patients with obesity and metabolic disorders — a systematic review
First author, year | Selection | Comparability | Exposure | ||||||
Is the case definition adequate? | Representativeness of the cases | Selection of controls | Definition of controls | Comparability of baseline characteristic 1 (sex) | Comparability of baseline characteristic 2 (Age) | Ascertainment of exposure | Same method of ascertainment for cases and controls | Nonresponse rate | |
Andoh, 2016 [18] | * | * | * | * | NA | NA | NA | NA | * |
Bai, 2019 [19] | * | * | NA | NA | NA | NA | NA | NA | * |
Chen, 2020 [20] | * | * | * | * | NA | NA | NA | NA | * |
Da Silva, 2020 [21] | * | * | * | * | * | * | NA | NA | * |
Gao, 2018 [22] | * | * | * | * | NA | NA | NA | NA | * |
Gao, 2018 [23] | * | * | * | * | * | * | NA | NA | * |
Haro, 2016 [24] | * | * | * | * | * | NA | NA | NA | * |
Houttu, 2018 [25] | * | * | * | * | NA | * | NA | NA | * |
Hu, 2015 [26] | * | * | * | * | * | * | NA | NA | * |
Kaplan, 2019 [27] | * | * | NA | NA | NA | NA | NA | NA | * |
Liu, 2017 [28] | * | * | * | * | NA | NA | NA | NA | * |
Lopez-Contreras, 2018 [29] | * | * | * | * | * | * | * | NA | * |
Lv, 2019 [30] | * | * | NA | NA | NA | NA | NA | NA | * |
Mendez-Salazar, 2018 [31] | * | * | * | * | NA | NA | * | NA | * |
Nardelli, 2020 [32] | * | * | * | * | NA | NA | NA | NA | * |
Blasco, 2017 [33] | * | * | * | * | NA | * | NA | NA | * |
Davis, 2017 [34] | * | * | * | NA | NA | NA | * | NA | * |
Dominianni, 2015 [35] | * | * | * | * | * | * | NA | NA | * |
Escobar, 2015 [36] | * | * | * | * | NA | * | NA | NA | * |
Kasai, 2015 [37] | * | * | * | * | * | * | NA | NA | * |
Nirmalkar, 2018 [38] | * | * | * | * | NA | * | NA | NA | * |
Ottosson, 2018 [39] | * | * | * | * | NA | NA | NA | NA | * |
Peters, 2018 [40] | * | * | * | * | * | * | NA | NA | * |
Ppatil, 2012 [41] | * | * | * | * | NA | NA | NA | NA | * |
Rahat- Rozenbloom, 2014 [42] | * | * | * | * | * | * | NA | NA | * |
Riva, 2017 [43] | * | * | * | * | NA | NA | NA | NA | * |
Vieira-Silva, 2020 [44] | * | * | * | NA | NA | NA | * | * | * |
Ville, 2020 [45] | * | * | * | * | NA | NA | NA | NA | * |
Yasir, 2015 [46] | * | * | * | * | NA | NA | NA | NA | * |
Yun, 2017 [47] | * | * | * | * | NA | * | NA | NA | * |
Zacarias, 2018 [48] | * | * | * | * | NA | * | * | NA | * |
Allin, 2018 [49] | * | * | * | * | * | * | NA | NA | * |
Barengolts, 2018 [50] | * | * | * | * | NA | * | * | NA | * |
Leite, 2017 [51] | * | * | * | * | NA | NA | NA | NA | * |
Qin, 2012 [52] | * | * | * | * | NA | NA | NA | NA | * |
Karlsson, 2013 [53] | * | * | * | * | NA | NA | NA | NA | * |
Larsen, 2010 [54] | * | * | * | * | NA | NA | NA | NA | * |
Ahmad, 2019 [55] | * | * | * | * | * | NA | NA | NA | * |
Koo, 2019 [56] | * | * | * | * | * | * | NA | NA | * |
Sroka-oleksiak, 2020 [57] | * | * | * | * | NA | * | NA | NA | * |
Thingholm, 2019 [58] | * | * | * | * | NA | NA | NA | NA | * |
Zhao, 2019 [59] | * | * | * | * | NA | NA | NA | NA | * |
Jiang, 2018 [60] | * | * | * | * | * | * | NA | NA | * |
Shen, 2017 [61] | * | * | * | * | * | * | NA | NA | * |
Sobhonslidsuk, 2018 [62] | * | * | * | * | * | * | NA | NA | * |
Wang, 2016 [63] | * | * | * | NA | NA | NA | NA | NA | * |
Li, 2018 [64] | * | * | * | * | * | * | NA | NA | * |
Nistal, 2019 [65] | * | * | * | * | * | * | NA | NA | * |
Yun, 2019 [66] | * | * | * | * | * | * | NA | NA | * |
Michail, 2015 [67] | * | * | * | * | NA | NA | NA | NA | * |
Zhu, 2013 [68] | * | * | * | * | NA | NA | NA | NA | * |
Chavez-Carbajal, 2019 [69] | * | * | * | * | NA | * | NA | NA | * |
De La Cuesta-Zuluaga, 2018 [70] | * | * | * | NA | NA | * | NA | * | |
Gallardo-Becerra, 2020 [71] | * | * | * | * | * | * | NA | NA | * |
Gozd-Barszczewska, 2017 [72] | * | NA | NA | NA | NA | NA | * | NA | * |
Kashtanova, 2018 [73] | * | * | NA | NA | NA | NA | NA | NA | * |
Lippert, 2017 [74] | * | * | * | * | NA | NA | NA | NA | * |
Feinn, 2020 [75] | * | * | * | * | * | * | NA | NA | * |
Li, 2021 [76] | * | * | * | * | NA | NA | NA | NA | * |
Yuan, 2021 [77] | * | * | * | * | NA | NA | NA | NA | * |