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Volume 18, Number 5—May 2012
Research

No Association between 2008–09 Influenza Vaccine and Influenza A(H1N1)pdm09 Virus Infection, Manitoba, Canada, 2009

Salaheddin M. MahmudComments to Author , Paul Van Caeseele, Gregory Hammond, Carol Kurbis, Tim Hilderman, and Lawrence Elliott
Author affiliations: University of Manitoba, Winnipeg, Manitoba, Canada (S.M. Mahmud, P. Van Caeseele, G. Hammond, T. Hilderman, L. Elliott); Winnipeg Regional Health Authority, Winnipeg (S.M. Mahmud, C. Kurbis); Cadham Provincial Laboratory, Winnipeg (P.V. Caeseele); Manitoba Health, Winnipeg (T. Hilderman, L. Elliott)

Main Article

Table 6

Demographic and clinical characteristics of case-patients and controls in a study of the association between the 2008–09 TIV and influenza A(H1N1)pdm09 virus infection, Manitoba, Canada, 2009*

Characteristic No (%) study participants, by age group, y
<12 12–19 20–34 35–44 45–­64 >65
Community controls
Total 381 (15.4) 242 (9.8) 553 (22.3) 384 (15.5) 638 (25.7) 281 (11.3)
Female sex 185 (48.6) 138 (57.0) 353 (63.8) 237 (61.7) 385 (60.3) 170 (60.5)
Chronic disease 30 (7.9) 21 (8.7) 57 (10.3) 74 (19.3) 203 (31.8) 163 (58.0)
Receipt of 2007–08 TIV 34 (8.9) 19 (7.9) 76 (13.7) 67 (17.4) 187 (29.3) 161 (57.3)
Receipt of 2008–09 TIV 53 (13.9) 20 (8.3) 80 (14.5) 72 (18.8) 179 (28.1) 160 (56.9)
Community case-patients
Total 180 (28.8) 105 (16.8) 154 (24.6) 76 (12.1) 102 (16.3) 9 (1.4)
Female sex 88 (48.9) 50 (47.6) 81 (52.6) 39 (51.3) 58 (56.9) 6 (66.7)
Chronic disease 9 (5.0) 15 (14.3) 17 (11.0) 13 (17.1) 29 (28.4) 7 (77.8)
Receipt of 2007–08 TIV 26 (14.4) 9 (8.6) 24 (15.6) 21 (27.6) 35 (34.3) 8 (88.9)
Receipt of 2008–09 TIV 24 (13.3) 10 (9.5) 20 (13.0) 15 (19.7) 34 (33.3) 6 (66.7)
Hospitalized case-patients
Total 68 (33.2) 21 (10.2) 44 (21.5) 25 (12.2) 37 (18.0) 10 (4.9)
Female sex 23 (33.8) 13 (61.9) 32 (72.7) 12 (48.0) 27 (73.0) 8 (80.0)
Chronic disease 17 (25.0) 5 (23.8) 10 (22.7) 13 (52.0) 25 (67.6) 8 (80.0)
Receipt of 2007–08 TIV 6 (8.8) 0 (0.0) 4 (9.1) 9 (36.0) 12 (32.4) 6 (60.0)
Receipt of 2008–09 TIV 9 (13.2) 3 (14.3) 4 (9.1) 5 (20.0) 14 (37.8) 4 (40.0)

*TIV, inactivated trivalent influenza vaccine.

Main Article

Page created: April 05, 2012
Page updated: April 05, 2012
Page reviewed: April 05, 2012
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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