Volume 18, Number 9—September 2012
CME ACTIVITY - Research
Evaluation of Diagnostic and Therapeutic Approaches for Suspected Influenza A(H1N1)pdm09 Infection, 2009–2010
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).