TABLE 2.

Temporal Trends in the Incidence of All SSIs During 16 Years, Olmsted County, Minnesota^a,b

Type of SSI	1993-2008 (N=1424)	Study period
		1993-1996 (n=401)	1997-2000 (n=411)	2001-2004 (n=337)	2005-2008 (n=275)	P value
All	100 (7.0) [5.7-8.4]	36 (9.0) [6.4-12.3]	30 (7.3) [5.2-10.5]	21 (6.2) [3.9-9.4]	13 (4.7) [2.3-7.5]	.02
Superficial sternal	28 (2.0) [1.2-2.7]	6 (1.5) [1.0-3.2]	10 (2.4) [1.2-4.4]	3 (0.9) [0.2-3.0]	9 (3.3) [1.5-6.1]	.34
Deep sternal	22 (1.5) [0.9-2.2]	12 (3.0) [1.6-5.2]	2 (0.5) [0.1-1.7]	7 (2.1) [1.0-4.0]	1 (0.4) [0.0-2.0]	.04
Leg harvest	50 (3.5) [2.6-4.5]	18 (4.5) [2.7-7.0]	18 (4.4) [2.6-6.8]	11 (3.3) [1.9-6.2]	3 (1.1) [0.2-3.2]	.02

^aSSI = surgical site infection.

^bData are given as No. (percentage) [95% confidence interval].