Table 2: Comparison of demographics, main clinical presentation, comorbidities and outcome between H1N1 positive flu A patients and H1N1 negative patients.

–		H1N1 Negative n.=166		H1N1 Positive n.=143		P Value
		n.	%	n.	%
Sex	Male	79	47.6	66	46.2	0.801
	Female	87	52.4	77	53.8
Age Median in years (25th P-75th P )	–	35.00 (27.00-53.25)		35.00 (30.00-52.00)		–
Main Symptoms	Respiratory	156	94.0	127	88.8	0.139
	GI	0	0.0	2	1.4
	Both	10	6.0	14	9.8
Comorbidities	Respiratory	18	10.8	26	18.2	0.066
	Cardiac	10	6.0	12	8.4	0.420
	DM	20	12.0	24	16.8	0.235
	CRF	1	0.6	1	0.7	0.916
Pregnancy	Negative	55	80.9	50	80.6	0.973
	Positive	13	19.1	12	19.4
Prolonged Illness		8	4.8	33	23.1	<.001
Radiological finding		12	7.2	17	11.9	0.161
Admission	Total	22	13.3	33	23.1	0.024
	Medical	20	12.0	29	20.3	0.075
	ICU	2	1.2	4	2.8
Death		0	0.0	1	0.7%	0.281
Length of stay LOS Median days (25th P-75th P )		3.00 (2.00-4.00)		3.00 (2.00-6.50)		0.146