Meta-analysis of the association between chronic periodontitis and chronic kidney disease

Table 5 Agency for Healthcare Research and Quality scores of cross-sectional studies

Ref.	1	2	3	4	5	6	7	8	9	10	11	Total points
Yoshioka et al[8]	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Uncertain	8
Tsai et al[9]	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Uncertain	Uncertain	8
Ioannidou and Swede[10]	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes	Uncertain	8
Han et al[11]	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Uncertain	Uncertain	8
Fisher et al[12]	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Uncertain	Uncertain	8
Lamba et al[13]	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Uncertain	Uncertain	7
Kshirsagar et al[4]	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Uncertain	Uncertain	8
Ioannidou et al[14]	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Uncertain	Uncertain	7
Garcez et al[20]	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Uncertain	No	Uncertain	Uncertain	7
Gavaldá et al[21]	Yes	Yes	Yes	Yes	Yes	Uncertain	No	Uncertain	No	Uncertain	Uncertain	5
Frankenthal et al[22]	Yes	No	Yes	Yes	Yes	Yes	No	No	No	Uncertain	Uncertain	5
Cengiz et al[23]	Yes	Yes	Yes	Yes	Yes	Uncertain	Yes	No	No	Uncertain	Uncertain	6
Limeres et al[24]	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	Uncertain	Uncertain	6
Camacho-Alonso et al[25]	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	Yes	Uncertain	8
Tollefsen et al[26]	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	Uncertain	Uncertain	6
Marakoglu et al[27]	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	Uncertain	Uncertain	7
Bayraktar et al[28]	Yes	Yes	No	Yes	Yes	Yes	Yes	No	No	Uncertain	Uncertain	6

1: Are the sources clear? 2: Are the inclusion and exclusion criteria for the two groups clear? 3: Is the time to identify patients clear? 4: Are the subjects continuous? 5: Is the evaluator isolated from other objective measures of the patient? 6: Has quality assurance been assessed? 7: Are excluded objects analyzed? 8: Are confounding factors assessed? 9: Is there any processing of the lost data? 10: Is the data complete? 11: Is there follow-up and analysis?