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Table 3 Quality of the studies utilizing the AHRQ quality assessment scale (cross-sectional studies)

From: Association of hyperhomocysteinemia and chronic kidney disease in the general population: a systematic review and meta-analysis

Reference (Year)

Total score

Chao

2014

1

1

1

0

1

1

1

1

0

1

1

9

Levi

2014

1

1

1

0

1

1

0

1

1

1

1

9

Chen

2015

1

1

1

0

1

1

1

0

1

1

1

9

Lai

2018

1

1

1

0

1

1

1

1

1

0

1

9

Moon

2020

1

1

1

0

1

1

1

1

1

1

1

10

  1. AHRQ: Whether the source of the data has been clarified (investigation, literature review); Include and exclude criteria for both exposed and non exposed groups (case and control) or refer to previous publications; Whether a time period for identifying patients has been provided; If it is not a population source, whether the research object is continuous; Whether the subjective factors of the evaluator conceal other aspects of the research object; Describe any evaluation conducted to ensure quality (such as testing/retesting of primary outcome indicators); To explain the reasons for excluding any patients from the analysis; Describe how to evaluate (or control measures for confounding factors; Explained how to handle lost data in the analysis if possible;⑩ To summarize the response rate of patients and the completeness of data collection;⑪ To identify the percentage of expected patients with incomplete data or follow-up results if follow-up is available