Table 5.

Risk of bias for animal studies, using the SYRCLE risk of bias tool.

	1	2	3	4	5	6	7	8	9	10
Study	Selection bias1	Selection bias2	Selection bias3	Performance Bias1	Performance Bias2	Detection Bias1	Detection Bias2	Attrition bias	Reporting bias	Other potential bias
Falahatian et al.	×	✓	✓	?	×	?	×	?	✓	✓
Ghyasi et al.	✓	✓	✓	?	×	×	؟	✓	✓	✓
Desai et al.	✓	✓	✓	?	?	?	?	✓	✓	✓
Elkelawy et al.	✓	✓	✓	?	?	×	؟	✓	✓	✓
Hajiuon et al.	✓	✓	×	?	×	؟	×	؟	✓	✓
Jafari et al.	؟	✓	؟	?	?	؟	؟	؟	✓	؟
Risikat et al.	✓	✓	؟	?	×	؟	؟	؟	✓	✓
Raji et al.	✓	✓	✓	?	?	؟	؟	×	✓	✓
Batool et al.	✓	؟	✓	?	?	✓	؟	؟	؟	؟
Iram et al.	✓	✓	✓	✓	?	?	?	?	✓	✓
Hagag et al.	✓	✓	✓	?	?	?	?	?	✓	✓
Parvez et al.	✓	✓	؟	?	?	؟	؟	✓	✓	✓
Kadir et al.	✓	✓	؟	?	?	✓	؟	؟	✓	؟
Ene et al.	✓	✓	✓	?	?	؟	؟	؟	✓	✓
Sheweita et al.	✓	✓	؟	?	✓	؟	؟	؟	✓	✓
Bashir et al.	✓	✓	×	?	?	؟	؟	✓	✓	✓
Ukpanukpong et al.	✓	✓	✓	?	?	✓	؟	؟	✓	✓
Al-Shaibani et al.	✓	✓	×	?	?	؟	؟	✓	✓	✓