Table 3: Risk scores for Medicare patients with NVAF with and without stroke and bleeding events.

Major bleeding events
Matching characteristics Ischemic strokeICHOther major bleeds
Event N = 7,799Control N = 33,084Event N = 1,276Control N = 5,097Events N = 14,996Control N = 60,058

CHA2DS2-VASc score
 Mean (SD)3.89 (1.49)3.81 (1.46)3.72 (1.46)3.68 (1.50)3.91 (1.51)3.69 (1.46)
 Median (range)4 (0–9)4 (0–9)4 (1–9)4 (0–9)4 (0–9)4 (0–9)
CHA2DS2-VASc, categorized, n (%)
 0 points7 (0.1%)17 (0.1%)0 (0.0%)3 (0.1%)13 (0.1%)30 (0.1%)
 1-2 points1,353 (17.4%)6,107 (18.5%)272 (21.3%)1,149 (22.5%)2,647 (17.7%)12,949 (21.6%)
 3–5 points5,337 (68.4%)22,861 (69.1%)858 (67.2%)3,358 (65.9%)10,086 (67.3%)40,401 (67.3%)
 6–9 points1,102 (14.1%)4,096 (12.4%)146 (11.4%)587 (11.5%)2,249 (15.0%)6,678 (11.1%)
HAS-BLED score
 Mean (SD)1.33 (0.75)1.30 (0.75)1.32 (0.76)1.27 (0.77)1.33 (0.78)1.25 (0.76)
 Median (range)1 (0–4)1 (0–4)1 (0–3)1 (0–3)1 (0–4)1 (0–4)
HAS-BLED, categorized, n (%)
 0 points1,036 (13.3%)4,552 (13.8%)181 (14.2%)790 (15.5%)2,099 (14.0%)9,777 (16.3%)
 1-2 points6,481 (83.1%)27,370 (82.7%)1,042 (81.7%)4,105 (80.5%)12,139 (81.0%)48,293 (80.4%)
 3–5 points282 (3.6%)1,165 (3.5%)53 (4.2%)202 (4.0%)757 (5.1%)1,994 (3.3%)

ICH: intracranial hemorrhage; SD: standard deviation.