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Volume 18, Number 2—February 2012

CME ACTIVITY

Invasive Pneumococcal Disease and Pandemic (H1N1) 2009, Denver, Colorado, USA

George E. NelsonComments to Author , Kenneth A. Gershman, David L. Swerdlow, Bernard W. Beall, and Matthew R. Moore
Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (G.E. Nelson, D.L. Swerdlow, B.W. Beall, M.R. Moore); Colorado Department of Health and the Environment, Denver, Colorado, USA (K.A. Gershman)

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Table 2

Severity of illness for patients with invasive pneumococcal disease, by age group, Denver, Colorado, USA, February and October 2009*

Characteristic No. (%) patients with pandemic (H1N1) 2009, Oct 2009, n = 58 No. (%) patients with seasonal influenza, Feb 2009, n = 45 p value
Age 0–19 y
Total 9 3
Hospitalized† 8 (89) 2 (67) 0.461
Admitted to ICUठ1 (13) NA NC
Died 0 0 NC
Age 20–39 y
Total 10 6
Hospitalized 7 (70) 5 (83) 0.551
Admitted to ICU 6 (86) NA NC
Died 0 0 NC
Age 40–59 y
Total 26 17
Hospitalized 26 (100) 13 (76) 0.168
Admitted to ICU 8 (31) NA NC
Died 3 1 0.532
Age >60 y
Total 13 19
Hospitalized 13 (100) 16 (84)¶ NC¶
Admitted to ICU 4 (31) NA NC
Died 4 3 0.354
Total
Hospitalized 54 (93) 36 (80) 0.536
Not hospitalized 4 (7) 2 (4)
Data missing 0 7 (16)
Admitted to ICU 19 (33) NA NC
Died 7 (12) 4 (9) 0.602

*ICU, intensive care unit; NA, not available; NC, not calculated.
†Denominator for percentage of hospitalized cases is total case-patients for each age group.
‡Percentage of those admitted to ICU is percentage of hospitalized case-patients for each age group.
§Includes data from supplemental case report form, not available for prior years.
¶Three case-patients with unknown hospitalization information. Of known case-patients, 100% were hospitalized.

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