Table 3.

Basic results of INR measurements

INR measurements	Hillingdon-algorithm	FH-algorithm	Traditional anticoagulation therapy
% time in INR range	49 (33–63)	55 (50–65)	55 (49–66)
% time in INR range < 2	26 (15–34)	23 (16–42)	31 (23–37)
% time in INR range > 3	23 (14–38)	13 (0–28)*	7 (0–18)**
Highest recorded INR	4.0 (3.4–4.7)	3.4 (2.9–5.1)	3.3 (2.9–4.2)

FH: ”Frederiksberg Hospital” algorithm. Median values with 25–75 percentiles. *P < 0.05 and **P < 0.01 compared to Hillingdon-algorithm.