Table 3. Frequency of severity criteria as a function of influenza results.

	Negative influenza		Positive influenza		P
	n = 571		n = 213
	n	%	n	%
Polypnea	82	14.4%	39	18.3%	0.2
Cyanosis	19	3.3%	6	2.8%	0.7
Oxygen saturation Spa02 < 95%	280	49%	107	50.2	0.8
Pneumonia symptoms and signs	149	26.1%	57	26.7%	0.3
Wheeze	162	28.4%	68	31.9%	0.3
Tachycardia	92	16.1%	26	12.2	0.2
Hypotension	35	6.1%	14	6.6%	0.8
Areas of mottled skin	27	4.7%	12	5.6%	0.6
Discomfort	20	3.5	9	4.2%	0.6
Changes in mental status	21	3.7%	13	6.1%	0.1
Oliguria	2	0.35%	3	1.4%	0.09
At least one of the above	401	70.2%	151	70.9	0,9
Positive bacteriological sample	31	5.4%	61	28.6%	0.000004