Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

Volume 16, Number 12—December 2010

Dispatch

Pandemic (H1N1) 2009 Outbreak at Canadian Forces Cadet Camp

Rhonda Y. KroppComments to Author , Laura E. Bogaert, Robert Barber, Francois-William Tremblay, Robert Ennis, Martin Tepper, Robert Pless, Nathalie Bastien, Yan Li, Carole Beaudoin, James Anderson, Louise Pelletier, and Rachel Rodin
Author affiliations: Author affiliations: Public Health Agency of Canada, Ottawa, Ontario, Canada (R.Y. Kropp, F-W. Tremblay, R. Pless, L. Pelletier, R. Rodin); Department of National Defence Headquarters, Ottawa (L.E. Bogaert, R. Barber, R. Ennis, M. Tepper, J. Anderson); Public Health Agency of Canada, Winnipeg, Manitoba, Canada (N. Bastien, Y. Li, C. Beaudoin)

Main Article

Table 2

Frequency of reported symptoms of pandemic (H1N1) 2009 infection, Army Cadet Summer Training Centre Argonaut at Canadian Forces Base, Gagetown, New Brunswick, Canada, 2009*

Symptoms No. persons reporting symptom/no. persons reporting (%)
OR (95% CI)‡
All participants, n = 165 Persons with confirmed/ suspected cases,† n = 80 Controls, n = 85
None
28/165 (17.0)
1/80 (1.3)
27/85 (31.8)

Systemic
Fever 56/164 (34.1) 55/80 (68.8) 1/84 (1.2)
Chills 44/165 (26.7) 41/80 (51.2) 3/85 (3.5)
Headache 58/165 (35.2) 39/80 (48.8) 19/85 (22.4) 3.3 (1.7–6.5)§
Prostration 52/164 (31.7) 37/79 (46.8) 15/85 (17.6) 4.1 (2.0–8.4)¶
Malaise 67/165 (40.6) 47/80 (58.8) 20/85 (23.5) 4.6 (2.4–9.0)¶
Arthralgia 19/165 (11.5) 13/80 (16.2) 6/85 (7.1) 2.6 (0.9–7.1)
Myalgia
26/165 (15.8)
20/80 (25.0)
6/85 (7.1)
4.4 (1.7–11.6)§
Lower respiratory
Cough 97/165 (58.8) 76/80 (95.0) 21/85 (24.7)
Sputum production 33/164 (20.1) 26/79 (32.9) 7/85 (8.2) 5.5 (2.2–13.5)¶
Shortness of breath 30/165 (18.2) 26/80 (32.5) 4/85 (4.7) 9.8 (3.2–29.5)¶
Chest pain
14/165 (8.5)
13/80 (16.2)
1/85 (1.2)
16.3 (2.1–127.8)§
Upper respiratory
Sore throat 76/164 (46.3) 56/80 (70.0) 20/84 (23.8)
Nasal congestion 76/164 (46.3) 55/79 (69.6) 21/85 (24.7)
Sneezing 27/164 (16.5) 20/79 (25.3) 7/85 (8.2) 3.8 (1.5–9.5)§
Runny nose 41/159 (25.8) 32/75 (42.7) 9/84 (10.7) 6.2 (2.7–14.2)¶
Nosebleeds
10/165 (6.1)
9/80 (11.2)
1/85 (1.2)
10.6 (1.3–86.1)#
Gastrointestinal
Nausea 50/165 (30.3) 42/80 (52.5) 8/85 (9.4)
Abdominal pain 28/165 (17.0) 17/80 (21.2) 11/85 (12.9) 1.8 (0.8–4.2)
Diarrhea 26/165 (15.8) 19/80 (23.8) 7/85 (8.2) 3.5 (1.4–8.8)#
Vomiting
24/165 (14.5)
20/80 (25.0)
4/85 (4.7)
6.8 (2.2–20.8)¶
Neurologic
Seizures 0/164 (0.0) 0/80 (0.0) 0/85 (0.0) NA
Change in awareness
29/165 (17.6)
25/80 (31.2)
4/85 (4.7)
9.2 (3.0–27.9)¶
Other
Conjunctivitis 2/164 (1.2) 1/79 (1.3) 1/85 (1.2) 1.0 (0.1–17.5)
Other**
16/165 (9.7)
14/80 (17.5)
2/85 (2.4)
8.8 (2.0–40.1)§
Mean no. symptoms 6.5 8.7 3.4

*One person reported no symptoms but was PCR and culture positive. OR, odds ratio; CI, confidence interval; NA, not applicable.
†Fever and nausea reported by a greater proportion of cases than suspected cases (p<0.001 and p = 0.02, respectively). Cases and suspect cases did not differ significantly in frequency of symptoms not in the case definition or median number of symptoms and have therefore been combined here.
‡Odds ratios were not calculated for symptoms included in the case definition (fever, chills, cough, sore throat, congestion, nausea).
§p<0.01.
¶p<0.001.
#p<0.05.
**Other symptoms reported: bilateral ear infection, bruising, ear pain, ear popping, eye pain, hot flashes, jaw pain, loss of appetite, loss of voice, rib pain, swelling of eyes, swollen tonsils, toothache (1 person each); dizziness (3 persons). All persons who reported symptoms in this category had >1 other reported symptom.

Main Article

Top of Page

USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO