Table 3: The frequency of each ACR grade (ISHLT 2004) according to EMBs quality.

ACR grades EMBs (%) quality Percentage of ACR in all group
Big samples Middle samples Small samples Not diagnostics material
1R (minimal) 24.5% EMBs 70.9% EMBs 4.5% EMBs 0% EMBs 19% EMBs
2R (mild) 35% EMBs 58.3% EMBs 6.7% EMBs 0% EMBs 4.4% EMBs
3R (severe) 0% EMBs 0% EMBs 0% EMBs 0% EMBs 0% EMBs
Minimal ACR 29% EMBs 66.7% EMBs 4.3% EMBs 0% EMBs 5.1% EMBs