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Table 1 Quality assessment of studies included in the systematic review

From: Meta-analysis of the growth rates of abdominal aortic aneurysm in the Chinese population

Study

Study type (P, R, PR)

Study type (RCT/obs)

Standardisation of imaging

Variability of diameter given

Patient selection criteria

Li, J., 2008

R

Obs

Y

N

All patients diagnosed as AAA during 1975 and 2007 in the Department of Geriatric Medicine of Beijing Hospital with imaging proof (US, CT or MRI)

Fan, L.H. 1999

Unclear

Obs

N

N

Not described

Wu, Q., 2009

R

Obs

N

N

All patients aged above 80 and diagnosed as AAA during January, 1997 and Juanuary, 2008 in People’s Liberation Army General Hospital

Zhang, L.F., 2006

P

Obs

Y

N

All patients whose medical history and imaging data are complete and aneurysm had been regularly monitored after being diagnosed as AAA in Air Force General Hospital.

Zhao, B. 2008

P

Obs

N

N

Randomly selected from outpatients and inpatients diagnosed with AAA during US screening, and with no syptom or sign.

Song, H.G., 2013

R

Obs

N

N

Not described.

  1. Abbreviations: N no, U unclear, Y yes, Obs observational study, P prospective, PR prospective and retrospective, R retrospective, RCT randomized controlled trial