TABLE 3.

Distribution of the 112 MRSA and 246 MSSA strains included in this study into PFGE divisions

Survey period or parameter	No. of strains (incidence/1,000 PD) according to PFGE division
	Total	I	II	III	IV	V	VI	VII	VIII	IX	X	XI	XII	XIII
All strains	358 (0.178)	25 (0.012)	26 (0.013)	44 (0.022)	24 (0.012)	22 (0.011)	40 (0.020)	26 (0.013)	6 (0.003)	28 (0.014)	43 (0.021)	30 (0.015)	9 (0.004)	22 (0.011)
2004	122 (0.167)	7 (0.010)	11 (0.015)	15 (0.021)	18 (0.025)	6 (0.008)	24 (0.033)	18 (0.025)			11 (0.015)	6 (0.008)	2 (0.003)	4 (0.005)
2005	79 (0.130)	12 (0.020)	3 (0.005)	6 (0.010)	1 (0.002)	8 (0.013)	13 (0.021)	3 (0.005)	6 (0.010)	2 (0.003)	5 (0.008)	12 (0.020)	4 (0.007)	4 (0.007)
2006	157 (0.234)	6 (0.009)	12 (0.018)	36 (0.054)	5 (0.007)	8 (0.012)	3 (0.004)	5 (0.007)		26 (0.039)	27 (0.040)	12 (0.018)	3 (0.004)	14 (0.021)
P valuea	<0.001 (↑)	0.096	0.036 (↑)	<0.001 (↑)	0.139	0.814	0.006 (↓)	0.429	0.011	<0.001 (↑)	<0.001 (↑)	0.773	0.436	0.035 (↑)
MRSA	112 (0.056)	19 (0.009)	21 (0.010)	13 (0.006)	17 (0.008)	18 (0.009)		4 (0.002)		5 (0.002)	5 (0.002)	2 (0.001)		8 (0.004)
2004	43 (0.059)	5 (0.007)	11 (0.015)	3 (0.004)	15 (0.021)	5 (0.007)					1 (0.001)			3 (0.004)
2005	23 (0.038)	11 (0.018)	3 (0.005)	2 (0.003)	1 (0.002)	6 (0.010)
2006	46 (0.068)		7 (0.010)	8 (0.012)	1 (0.001)	7 (0.010)		4 (0.006)		5 (0.007)	4 (0.006)	2 (0.003)		5 (0.007)
P value	0.022	<0.001 (↓)	0.224	0.078	0.720	0.947		0.078		0.042 (↑)	0.078	0.280		0.042
CMRSA	78 (0.039)	15 (0.007)	17 (0.008)	1 (<0.001)	14 (0.007)	16 (0.008)		3 (0.001)		3 (0.001)	5 (0.002)	1 (<0.001)		3 (0.001)
2004	33 (0.045)	3 (0.004)	10 (0.014)	1 (0.001)	12 (0.016)	4 (0.005)					1 (0.001)			2 (0.003)
2005	18 (0.030)	9 (0.015)	2 (0.003)		1 (0.002)	6 (0.010)
2006	27 (0.040)	3 (0.004)	5 (0.007)		1 (0.001)	6 (0.009)		3 (0.004)		3 (0.004)	4 (0.006)	1 (0.001)		1 (0.001)
P value	0.342	0.052	0.277		0.720	0.839		0.148		0.148	0.078	0.529		0.529
NORSA	34 (0.017)	4 (0.002)	4 (0.002)	12 (0.006)	3 (0.001)	2 (0.001)		1 (<0.001)		2 (0.001)		1 (<0.001)		5 (0.002)
2004	10 (0.014)	2 (0.003)	1 (0.001)	2 (0.003)	3 (0.004)	1 (0.001)								1 (0.001)
2005	5 (0.008)	2 (0.003)	1 (0.002)	2 (0.003)
2006	19 (0.028)		2 (0.003)	8 (0.012)		1 (0.001)		1 (0.001)		2 (0.003)		1 (0.001)		4 (0.006)
P value	0.010 (↑)	0.221	0.544	0.078		0.529		0.529		0.280		0.529		0.078
MSSA	246 (0.122)	6 (0.003)	5 (0.002)	44 (0.022)	7 (0.003)	4 (0.002)	40 (0.020)	22 (0.011)	6 (0.003)	23 (0.011)	38 (0.019)	28 (0.014)	9 (0.004)	14 (0.007)
2004	79 (0.108)	2 (0.003)		12 (0.016)	3 (0.004)	1 (0.001)	24 (0.033)	18 (0.025)			10 (0.014)	6 (0.008)	2 (0.003)	1 (0.001)
2005	56 (0.092)	1 (0.002)		4 (0.007)		2 (0.003)	13 (0.021)	3 (0.005)	6 (0.010)	2 (0.003)	5 (0.008)	12 (0.020)	4 (0.007)	4 (0.007)
2006	111 (0.165)	3 (0.004)	5 (0.007)	28 (0.042)	4 (0.006)	1 (0.001)	3 (0.004)	1 (0.001)		21 (0.028)	23 (0.034)	10 (0.015)	3 (0.004)	9 (0.013)
P value	<0.001 (↑)	0.358	0.042 (↑)	<0.001 (↑)	0.078	0.456	0.006 (↓)	0.270	0.011 (↓)	<0.001 (↑)	0.002 (↑)	0.482	0.436	0.239
EMSSA	20 (0.010)	1 (<0.001)		5 (0.002)	2 (0.001)	3 (0.001)	4 (0.002)			3 (0.001)		2 (0.001)
2004	6 (0.008)	1 (0.001)		1 (0.001)		1 (0.001)	2 (0.003)					1 (0.001)
2005	3 (0.005)					1 (0.002)	2 (0.003)
2006	11 (0.016)			4 (0.006)	2 (0.003)	1 (0.001)				3 (0.004)		1 (0.001)
P value	0.055			0.078	0.280	0.720	0.221			0.148		0.529

^aChi square was calculated for data for the years 2005 and 2006. ↑, increase; ↓, decrease.