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Volume 18, Number 4—April 2012


Influenza-associated Hospitalizations by Industry, 2009–10 Influenza Season, United States

Sara E. LuckhauptComments to Author , Marie Haring Sweeney, Renee Funk, Geoffrey M. Calvert, Mackenzie Nowell1, Tiffany D’Mello, Arthur Reingold, James Meek, Kimberly Yousey-Hindes, Kathryn E. Arnold, Patricia Ryan, Ruth Lynfield, Craig Morin, Joan Baumbach, Shelley Zansky, Nancy M. Bennett, Ann Thomas, William Schaffner, and Timothy Jones
Author affiliations: Centers for Disease Control and Prevention, Cincinnati, Ohio, USA (S.E. Luckhaupt, M. H. Sweeney, G.M. Calvert); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (R. Funk, M. Nowell, T. D’Mello); University of California, Berkeley, California, USA (A. Reingold); Yale University, New Haven, Connecticut, USA (J. Meek, K. Yousey-Hindes); Georgia Division of Public Health, Atlanta (K. E. Arnold); Maryland Department of Health and Mental Hygiene, Baltimore, Maryland, USA (P. Ryan),; Minnesota Department of Health, Minneapolis, Minnesota, USA (R. Lynfield, C. Morin); New Mexico Department of Health, Santa Fe, New Mexico, USA (J. Baumbach); New York State Department of Health, Albany, New York, USA (S. Zansky); University of Rochester, Rochester, New York, USA (N. M. Bennett); Oregon Public Health Division, Portland, Oregon, USA (A. Thomas); Vanderbilt University, Nashville, Tennessee, USA (W. Schaffner); Tennessee Department of Health, Nashville (T. Jones)

Main Article

Table 1

Employment status among US adults hospitalized with influenza September 1, 2009–April 24, 2010 by age group, compared with data from the 2010 NHIS*

Status No. (%) cases† Estimated US populations in thousands (weighted %) from NHIS† Ratio (95% CI)
Age 18–49 y
Employed 825 (45.2) 94,862 (71.3) 0.63 (0.59–0.68)
Not employed 999 (54.8) 38,170 (28.7) 1.91 (1.79–2.03)
Employment status unknown 586 (24.3) 36 (0) NA
Age 50–64 y
Employed 409 (41.2) 36,045 (62.4) 0.66 (0.60–0.73)
Not employed 583 (58.8) 21,675 (37.6) 1.56 (1.44–1.70)
Employment status unknown 300 (23.2) 24 (0) NA
Age >65 y
Employed 49 (8.9) 5,697 (14.7) 0.61 (0.45–0.80)
Not employed 500 (91.1) 32,980 (85.3) 1.07 (0.98–1.17)
Employment status unknown 101 (15.5) 15 (0) NA

*NHIS, National Health Interview Survey; NA, not applicable.
†Percentage among case-patients/respondents with known work status and among all case-patients/respondents with unknown work status.

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1Current affiliation: Florida Department of Health, Orlando, Florida, USA.

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