Author

Were the criteria for inclusion in the sample clearly defined?

Were the study subjects and the setting described in detail?

Was the exposure measured in a valid and reliable way?

Were objective, standard criteria used for measurement of the condition?

Were confounding factors identified?

Were strategies to deal with confounding factors stated?

Were the outcomes measured in a valid and reliable way?     

Was appropriate statistical analysis used?

Minani, et al. 1996 [4]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Hisatomi, et al. 2003 [5]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Asaumi, et al. 2005 [7]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Konouchi, et al. 2006 [8]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Hisatomi, et al. 2011 [9]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Srinivasan, et al. 2012 [14]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Kheir, et al. 2013 [15]

Yes

Yes

Yes

Yes

No

NA

Yes

Yes

Apajalahti, et al. 2015 [23]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Probst, et al. 2015 [10]

Yes

Yes

Yes

Yes

No

NA

Yes

Yes

Han, et al. 2018 [11]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Juerchott, et al. 2018 [16]

Yes

Yes

Yes

Yes

No

NA

Yes

Yes

Lizio, et al. 2018 [24]

Yes

No

Yes

Yes

Yes

NA

Yes

Yes

Ogura, et al. 2019 [12]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Baba, et al. 2020 [13]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Vanagundi, et al. 2020 [17]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes

Wamasing, et al. 2021 [18]

Yes

Yes

Yes

Yes

Yes

NA

Yes

Yes