Table 3. TTR and proportion of INR 2.0–3.0 included in TTR analysis in each center.

Center	No.	Mean TTR (95% CI)	INR 2.0–3.0 (%)
1	88	55.9 (52.3–59.5)	46.3
2	95	47.4 (43.1–51.7)	42.9
3	63	51.7 (47.5–56.0)	40.9
4	56	42.7 (38.0–47.4)	36.1
5*	121	58.4 (54.9–61.9)	51.7
6	64	45.6 (40.8–50.4)	46.1
7	31	45.6 (39.3–51.8)	40.4
8	60	37.1 (32.2–42.0)	37.0
9	48	50.0 (45.0–55.0)	44.2
10	38	49.2 (41.7–56.7)	44.9
11*	107	57.5 (53.7–61.3)	53.4
12	39	50.6 (44.0–57.2)	47.9
13	129	38.6 (35.1–42.0)	36.4
14	131	53.6 (49.9–57.2)	50.1
15	59	37.3 (32.0–42.6)	37.7
16*	101	50.4 (46.0–54.8)	43.6

Data are mean (95% CI) or % values.

^*Centers in which warfarin therapy was managed by a formal anticoagulation clinic during the study period.

INR: international normalized ratio, TTR: time in therapeutic range.