Table 7:

Quality assessment of cross-sectional studies

	CROSS-SECTIONAL ANALYSIS
Citation	1. Were the criteria for inclusion in the sample clearly defined?	2. Were the study subjects and the setting described in detail?	3. Was the exposure measured in a valid and reliable way?	4. Were objective, standard criteria used for measurement of the condition?	5. Were confounding factors identified?	6. Were strategies to deal with confounding factors stated?	7. Were the outcomes measured in a valid and reliable way?	8. Was appropriate statistical analysis used?
Azevedo 2017	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Bryniarski 2021	No	No	No	No	No	Yes	Yes	Yes
Buzgova 2014	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Buzgova 2015	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Chan 2014	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Delgado-Guay 2009	Yes	Yes	Yes	Yes	No	No	Yes	Yes
Ganzini 2010	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Grotmol 2017	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Grotmol 2019	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
HeNoch 2007	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Huang 2019	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Irwin 2008	Yes	Yes	Yes	Yes	No	No	Yes	Yes
Janssens 2019	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Masel 2016	Yes	Yes	Yes	Yes	No	No	Yes	Yes
McMillan 2009	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Smith 2003	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Smitz 2006	Yes	Yes	No	Yes	No	No	Yes	Yes
Sudarisan 2019	No	Yes	Yes	Yes	Yes	No	Yes	Yes
Teunissen 2007	Yes	Yes	Yes	Yes	No	No	Yes	Yes