Table 2.

Pre-diagnostic use of warfarin compared to anticoagulant non-users and warfarin usage in comparison with other anticoagulant drugs stratified by Defined Daily Doses (DDD), duration and intensity of usage

	n of deaths	Age-adjusted	Multivariable-adjusted
Warfarin compared to non-users
None	624	Ref	Ref
Any	65	1.11 (0.85-1.44)	1.15 (0.88-1.49)
Amount of warfarin use
≤200 DDD	24	0.98 (0.65-1.48)	0.97 (0.64-1.47)
201-796 DDD	18	1.09 (0.68-1.74)	1.19 (0.74-1.91)
>796 DDD	23	1.31 (0.86-1.99)	1.37 (0.90-2.09)
Duration of warfarin use
≤1 year	20	0.91 (0.53-1.56)	0.72 (0.42-1.24)
2-4 years	22	0.96 (0.57-1.61)	0.87 (0.52-1.47)
5 or more years	23	1.33 (0.80-2.23)	1.16 (0.69-1.94)
Intensity of warfarin use
≤114 DDD/year	21	0.95 (0.56-1.62)	0.79 (0.47-1.35)
115-200 DDD/year	24	1.09 (0.65-1.81)	0.94 (0.57-1.57)
>200 DDD/year	20	1.10 (0.64-1.89)	0.96 (0.56-1.65)

Age-adjusted and multivariable-adjusted hazard ratios (95% CI) related to all PCa deaths