Assessing the role of undetected colonization and isolation precautions in reducing Methicillin-Resistant Staphylococcus aureustransmission in intensive care units

Table 1 Summary statistics for the study data

Ward^a	Number of patients	Length of stay Mean(SD)	Percent in contact precaution^b	Number of swab tests per person Mean (SD)	Number of MRSA+ swab tests per person Mean (SD)	Number of swab tests taken after first positive^c
M1	1293	3.4 (4.7)	11.4	1.4 (0.8)	0.13 (0.5)	73
M2	1018	4.4 (6.4)	19.1	1.5 (0.9)	0.20 (0.61)	45
GS1	1227	3.4 (5.2)	12.4	1.3 (0.7)	0.14 (0.5)	63
GS2	1030	4.0 (8.3)	10.7	1.4 (0.9)	0.14 (0.5)	99
SS1	706	5.8 (11.4)	12.5	1.3 (0.9)	0.10 (0.5)	100
SS2	888	4.8 (9.7)	7.5	1.4 (1.1)	0.11 (0.6)	111
SS3	1097	3.8 (6.4)	6.0	1.2 (0.7)	0.05 (0.3)	51
SS4	1263	3.6 (5.2)	5.1	1.4 (0.8)	0.07 (0.3)	42

^a Here M denotes Medical or Cardiac ICU, GS denotes General Surgical ICU, including trauma and burn patients, SS denotes Specialty Surgical ICU.
^b Includes isolation indicators other than MRSA.
^c The total number of swab tests taken after the first MRSA-positive test.

ISSN: 1471-2334