Comparing Deaths from Influenza H1N1 and Seasonal Influenza A: Main Sociodemographic and Clinical Differences between the Most Prevalent 2009 Viruses

Table 2

Clinical characteristics of deceased cases, by type of influenza.

Variable	Non-H1N1	H1N1	𝑃 value; 𝑡-test
Pneumonia	33%	43%	0.125
Fever	84%	85%	0.826
Cough	81%	87%	0.229
Dyspnea	88%	73%	0.001
Expectoration	50%	48%	0.721
Myalgia	38%	31%	0.239
Rhinorrhea	28%	26%	0.769
Cyanosis	26%	25%	0.869
Headache	52%	29%	0.000
Chest pain	37%	15%	0.000
Nasal obstruction	5%	9%	0.196
Vomiting	6%	10%	0.189
Diarrhea	9%	9%	0.945
Days from symptoms start to care	6.86	6.30	0.582
Days from care to death	6.86	7.79	0.304
Days from symptoms start to death	13.96	14.03	0.962