Table 2.

Association of gut microbiota and type 1 diabetes

Authors	Year	Country	Type of study	Association between diabetes and microbiome
Rozanova et al. [41]	2002	Russia	Cohort	Yes
Brown et al. [23]	2011	Finland	Case–control	May
Giongo et al. [31]	2011	USA	Case–control	Yes
Murri et al. [26]	2013	Spain	Case–control	Yes
Richardson et al. [37]	2014	Finland	Cohort	Yes
de Goffau et al. [24]	2014	Netherlands	Case–control	Yes
Endesfelder et al. [38]	2014	Germany	Cohort	Yes
Mejia et al. [30]	2014	Mexico	Case–control	Yes
Soyucen et al. [28]	2014	Turkey	Case–control	Yes
Kostic et al. [39]	2015	Finland	Cohort	Yes
Alkanani et al. [5]	2015	USA	Cross-sectional	Yes
Cui et al. [18]	2016	China	Case–control	Yes
Maffeis et al. [25]	2016	Italy	Case–control	Yes
Stewart et al. [29]	2017	UK	Case–control	Yes
Pinto et al. [40]	2017	Portugal	Cohort	Yes
Pellegrini et al. [27]	2017	Italy	Case–control	Yes
Traversi et al. [21]	2017	Italy	Case–control	Not mentioned
Gao et al. [42]	2018	France	Cohort	Yes
Vatanen et al. [44]	2018	USA	Nested case–control	Yes
Stewart et al. [45]	2018	USA	Nested case–control	Yes
Huang et al. [32]	2018	China	Case–control	Yes
Gavin et al. [43]	2018	Australia	Cross-sectional	Yes
Leiva-Gea et al. [33]	2018	Spain	Case–control	Yes
Higuchi et al. [34]	2018	Brazil	Case–control	Yes
Salamon et al. [35]	2018	Poland	Case–control	Yes
Cinek et al. [36]	2018	Czech federation	Case–control	Yes