Table 2.

The relation with CVD events, prevalence, and PAF (%) of the four risk factor levels.

Number of risk factors	HR (95% CI)	Prevalence	PAF, %
0	Reference	1.4	Reference
1	1.65 (0.77; 3.54)	11.4	6.9
2	2.61 (1.24; 5.50)	32.0	34.0
3	3.25 (1.55; 6.84)	44.8	50.1
4	3.74 (1.77; 7.93)	10.4	22.2

Reference group are patients (N = 174) with none of the four risk factors. Prevalence per level was calculated as number of patients in that cluster level divided by the total amount of patients analyzed (n = 12,479). PAF calculation was included in the method section.