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Volume 18, Number 9—September 2012

CME ACTIVITY

Evaluation of Diagnostic and Therapeutic Approaches for Suspected Influenza A(H1N1)pdm09 Infection, 2009–2010

Vini Vijayan, Jennie Jing, and Kenneth M. ZangwillComments to Author 
Author affiliations: Los Angeles Biomedical Research Institute at Harbor–UCLA Medical Center, Torrance, California, USA

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Table

Patients who underwent testing or treatment for influenza by category, Los Angeles, California, USA, 2009*

Test results and treatment Inpatients† Outpatients‡
Influenza diagnostic test

Patients tested for influenza

Total

177/218 (81) 664/664 (100)

Adults

79/111 (71) 398/398 (100)

Children

98/107 (92) 266/266 (100)

Positive influenza test result

Total

74/177 (42) 96/664 (14)

Adults

18/79 (23) 19/398 (5)

Children

56/98 (57) 77/266 (29)

ILI among patients with a positive test result

Total

44/74 (59) 77/96 (80)

Adults

14/18 (78) 16/19 (84)

Children

30/56 (54) 61/77 (79)
Oseltamivir prescribed

Patients with positive influenza test result

53/74 (72) 22/96 (23)

Patients with coexisting condition

145/155(94) 15/28 (54)

Patients with severe influenza disease

118/129 (91) 0/3 (0)

Median time from illness onset to treatment, d

2 (1–8) 2 (1–5)

*Values are no./total no. (%) unless otherwise indicated. ILI, influenza-like illness.
†For inpatients who received a diagnostic test for influenza, N = 218; for outpatients who received a diagnostic test, N = 664. For inpatients who received oseltamivir, N = 218. In the outpatient setting, study cohort was identified through diagnostic testing only. Use of oseltamivir was evaluated only among those for whom a diagnostic test result was positive (N = 96).

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