Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

Volume 15, Number 2—February 2009

Research

Oseltamivir-Resistant Influenza Viruses A (H1N1), Norway, 2007–08

Siri H. Hauge, Susanne Dudman, Katrine Borgen, Angie Lackenby, and Olav HungnesComments to Author 
Author affiliations: Norwegian Institute of Public Health, Oslo, Norway (S.H. Hauge, S. Dudman, K. Borgen, O. Hungnes); Health Protection Agency, London, UK (A. Lackenby)

Main Article

Table 2

Reported associations for patients infected with oseltamivir-resistant or oseltamivir-susceptible influenza virus A (H1N1), 2007–08 influenza season, Norway

Association Resistant, n = 183
Susceptible, n = 89
Crude associations
Adjusted associations*
Attack rate, % No. responses Attack rate, % No. responses Risk ratio (95% CI)† Risk ratio (95% CI)
Sign or symptom
Productive cough 38.4 125 31.9 47 1.2 (0.8–1.9)
Fever 94.4 162 95.0 80 1.0 (0.9–1.1)
Myalgia 72.9 129 73.3 60 1.0 (0.8–1.2)
Dry cough 82.1 145 86.3 73 1.0 (0.8–1.1)
Headache 63.4 131 67.2 58 0.9 (0.8–1.2)
Sore throat 57.5 134 67.2 58 0.9 (0.7–1.1)
Runny nose
62.2
127

66.1
56

0.9 (0.8–1.2)


Complication
Pneumonia 9.2 153 2.9 69 3.2 (0.7–13.5) 3.2 (0.7–13.7)
Sinusitis 6.2 145 3.0 67 2.1 (0.5–9.4) 1.7 (0.4–7.5)
Otitis media 4.8 145 4.4 69 1.1 (0.3–4.2) 1.3 (0.4–4.8)
Bronchitis 8.7 149 11.8 76 0.7 (0.3–1.7) 0.8 (0.4–1.8)
Any
24.4
164

22.1
77

1.1 (0.7–1.8)

1.1 (0.7–1.8)
Hospitalization 15.8 177 19.5 87 0.8 (0.5–1.4) 0.8 (0.5–1.3)

*Risk ratio adjusted for age, gender, and predisposing disease.
†CI, confidence interval.

Main Article

TOP