Table 2 . Clustering of cardiovascular risk factors by blood pressure groups, Iran, 2013 .

Number of risk factors	Normal BP	Prehypertension	Total	p
	N=510	N=483	N=1538
0	45 (8.8)*	10 (2.1)	57 (3.7)	0.001
1	123 (24.1)	62 (12.7)	208 (13.5)	0.001
2	157 (30.8)	153 (31.7)	439 (28.5)	0.007
3	100 (19.6)	135 (28.0)	429 (27.9)	0.001
>4	85 (16.7)	123 (25.5)	405 (26.4)	0.001
Total	510 (100.0)	483 (100.0)	1538 (100.0)	----

^* N (%)

^aBP: Blood Pressure