Table 7.

Analysis of epidemiologic risk factors for S. aureus and MRSA nasal carriage among prisoners, Jimma town, 2011

Risk factors			Staphylococcus N=50		P	Methicilin-resistant S. aureus n=25		p
			S.aureus	CNS		Positive	Negative
Age	18-25	No.	20	9	0.005	9	11	0.787
		%	80.0	36.0		75.0	84.6
	26-35	No.	2	9		1	1
		%	8.0	36.0		8.3	7.7
	36-45	No.	3	7		2	1
		%	12.0	28.0		16.7	7.7
Sex	Male	No.	25	25	-	12	13	-
		%	100	100		100	100
Previous hospitalization in the past 1 year	Present	No.	5	2	0.417	2	3	1.00
		%	20	8		16.7	23.1
	Absent	No.	20	23		10	10
		%	80.	92		83.3	76.9
Antibiotic usage in the past 4 weeks	Present	No.	7	6	0.5	6	1	0.030
		%	28	24		50	7.7
	Absent	No.	18	19		6	12
		%	72	76		50	92.3
Extent of usage of subscribed antibiotics	Completed	No.	5	6	0.209	4	1	1.00
		%	62.5	100		66.7	50
	Not-Completed	No.	3	-		2	1
		%	37.5	-		33.3	50
Having respiratory infection at time of study	Present	No.	11	13	0.778	9	2	0.005
		%	44	52		75	15.4
	Absent	No.	14	12		3	11
		%	56	48		25	84.6
Number of prisoners in dormitory/room	1-20	No.	1	3	0.048	-	1	0.034
		%	4	12		-	7.7
	21-40	No.	1	6		-	1
		%	4	24		-	7.7
	41-60	No.	4	6		-	4
		%	16	24		-	30.8
	>60	No.	19	10		12	7
		%	76	40		100	53.8
Presence of hospital admitted patients in prisoner room(in the last 1yr)	Present	No.	8	12	0.387	5	3	0.411
		%	32	48		41.7	23.1
	Absent	No.	17	13		7	10
		%	68	52		58.3	76.9

N= total number of nasal swabs taken from prisoners, n= total number of Methicillin-Resistant S. aureus isolates from prisoners.