Table 3.: Demographic Characteristics, Clinical Outcomes and Nasal Wash Nitrate Between Subjects with ILI Infected with Novel (n) H1N1, Other Viruses, or with No Virus Detected, at the TCH ED During the 2009 nH1N1 Pandemic. Only Specimens with Detectable IgA and IgG are Included in the Analysis

Total N=61 (%) nH1N1 Virus Positive n=11 (%) Non-nH1N1 Virus Positive n=39 (%) No Virus Detected n=11 (%)
Age in Months: Median (IQR) 12 (6-41) 47 (7-76) 11 (5-20) 60 (9-115)
Gender
  Male 36 (59%) 6 (54%) 24 (61%) 6 (54%)
  Female 25 (41%) 5 (46%) 15 (39%) 5 (46%)
Ethnicity/Race
  Hispanic 40 (66%) 10 (91%) 27 (69%) 3 (27%)
  Non-Hispanic 21 (34%) 1 (9%) 12 (31%) 8 (73%)
  Black 2 0 2 0
  White 12 0 6 6
  Asian 7 1 4 2
Clinical Outcomes
  Hospitalized 10 (16%) 0 (0%) 8 (21%) 2 (18%)
  Hours in ED: Median (IQR)+ 3.5 (2.3-5.1) 3.5 (2.3-5.1) 3.5 (2.6-5.5) 3.8 (1.6-6.8)
  Supplemental Oxygen 3 (5%) 0 (0%) 2 (5%) 1 (9%)
  Hours of Oxygen: Median (IQR) NA NA NA NA
  Intravenous Fluids (IVF) 8 (13%) 0 (0%) 6 (15%) 2 (18%)
  Hours of IVF: Median (IQR) 26.2 (5.9-38.1) NA 3.5 (2.6-5.5) NA
  Healthcare visit after discharge 10 (17%) 2 (18%) 6 (15%) 2 (18%)
Nasal Wash Nitrate
  Median (IQR) Nitrate* 4.3 (0.5-10.0) 2.2 (0.0-10.3) 4.7 (0.4-11.8) 4.4 (1.8-4.9)
  Undetectable 13 (21%) 3 (27%) 8 (20%) 2 (18%)
  Missing 1 (2%) 0 (0%) 1 (3%) 0 (0%)
  Nitrate Detectable 47 (77%) 8 (73%) 30 (77%) 9 (82%)
   Median (IQR) Nitrate** 5.3 (3.3-12.1) 4.1 (2.1-13.8) 7.5 (3.5-15.8) 4.7 (3.9-6.8)

+ For patients discharged home from the ED.
* For all samples (p=0.57 by Kruskal-Wallis Test).
** For samples with detectable nitrate (p=0.476 by Kruskal-Wallis Test).