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. 2012 Dec 30;2012:501784. doi: 10.1155/2012/501784

Table 4.

Average differences after matching (H1N1 as exposure).

Variable Matched difference t-stat
Pneumonia 0.0804 1.02
Fever −0.0303 −0.54
Cough 0.1138 1.78
Dyspnea −0.1318 2.30
Expectoration −0.0469 −0.58
Myalgia −0.0704 −0.91
Rhinorrhea −0.0560 −0.79
Cyanosis −0.0117 −0.16
Headache −0.0210 2.51
Chest pain −0.1591 2.09
Nasal obstruction 0.0512 1.46
Vomiting 0.0212 0.50
Diarrhea 0.0083 0.17
Days from symptoms start to care 0.2744 0.20
Days from care to death 1.8296 1.63
Days from symptoms start to death 1.8925 1.05