This table shows the components of the CHADS2 (Gage et al., JAMA 2001) and CHA2DS2-VASc scores (Lip et al., Chest 2010) tools to assess stroke risk in patients with AF. These risk assessment tools help to determine who should and who should not receive anticoagulation.
CHA2DS2-VASc improves risk stratification in patients with CHADS2=0 or 1, and allows for identification of patients at truly low risk.

You can find this table in: 

EPCCS consensus guidance on stroke prevention in atrial fibrillation (SPAF) in primary care

 

The HAS-BLED bleeding risk scoring tools may also be of relevance to you:
HAS-BLED bleeding risk assessment score