TABLE II. ROBINS-I Method.

Low Risk		Moderate Risk		High Risk		Unclear Risk
Study	C1	C2	C3	C4	C5	C6	C7
[64]	L	M	L	L	M	L	L
[46]	H	H	M	M	H	M	H
[58]	H	H	H	M	H	M	H
[59]	M	L	L	L	H	L	M
[49]	H	H	M	M	H	M	H
[66]	H	H	L	M	H	M	H
[43]	H	H	L	M	H	M	H
[47]	L	L	L	M	L	U	U
[71]	L	L	L	M	M	L	L
[75]	H	H	H	M	H	M	H
[62]	H	H	L	L	H	H	H
[48]	H	H	H	U	U	H	H
[50]	L	L	H	L	L	U	M
[45]	L	L	L	U	L	U	M
[73]	L	H	L	M	L	M	M
[77]	M	H	H	M	H	M	M
[80]	L	L	M	M	L	M	M
[79]	L	H	H	U	L	L	M
[81]	M	L	M	M	L	L	H