(A) Quarterly trends in NOAC use by age group. 75–79 (r 0.86, p<0.001), 80–84 (r 0.62, p=0.003), 85–89 (r 0.67, p=0.001), ≥90 (r 0.23, p=0.340); p-value for interaction=0.007. (B) Quarterly trends in warfarin use by age group. 75–79 (r −0.07, p=0.750), 80–84(r −0.32, p=0.170), 85–89 (r 0.48, p=0.032), ≥90(r −0.41, p=0.070); p-value for interaction=0.028. (C) Quarterly trends in anticoagulant use by age group. 75–79 (r 0.58, p=0.008), 80–84 (r 0.02, p=0.930), 85–89 (r 0.81, p<0.001) and ≥90