Navigation Links
A comparison of severe outcomes during the waves of pandemic (H1N1) 2009

The second wave of the pandemic (H1N1) was substantially greater than the first with 4.8 times more hospital admissions, 4.6 times more deaths and 4 times more ICU cases, according to a study published in CMAJ (Canadian Medical Association Journal) (pre-embargo link only) However, because of the larger number of people hospitalized during the second wave compared to the first, the percentage of people with severe outcomes was smaller.

The researchers compared demographic and clinical characteristics as well as outcomes of patients with (H1N1) influenza admitted to hospital during the first wave with those admitted during the second wave and post-peak period of the pandemic.

In the first wave, Nunavut, Manitoba and Quebec had the highest rates for hospital admissions. In the second wave, all provinces and territories were affected with the Maritimes provinces, Alberta, British Columbia, the Yukon Territory and the Northwest Territories experiencing much higher rates of hospital admission than in the first one. Quebec and Ontario were impacted in both waves, with Quebec reporting the highest number of hospitalizations and Ontario reported the most deaths overall.

At the height of the first wave (May 31 to June 20, 2009), 9.4% of hospital admissions, 10.1% of ICU admissions and 10% of deaths occurred. At the height of the second wave (October 25 to November 14, 2009), 51% of overall hospital admissions, 49.4% of ICU admissions and 53% of deaths occurred.

ICU admissions and deaths as a percentage of hospitalizations went down in the second wave.

"The second wave was substantially larger and, although the patients admitted to hospital were older and more of them had underlying conditions, a smaller proportion had a severe outcome," writes Melissa Helferty, Public Health Agency of Canada and coauthors. "The differences are thought to be due mainly to public health and clinical interventions implemented between the first and second waves."

"A national seroprevalence survey at the end of the first wave would have allowed us to better qualify the severity of the cases in Canada and permitted a more accurate comparison with other countries," conclude the authors.


Contact: Kim Barnhardt
613-520-7116 x2224
Canadian Medical Association Journal

Related medicine news :

1. Comparison shows robot-assisted option offers advantages for kidney surgery
2. Comparison of available breast cancer risk assessment tools shows room for improvement
3. UT Southwestern investigators perform head-to-head comparison of incontinence treatments
4. What's The Best Whole House Water Purification System? Sweetwater LLC Provides Comparison
5. Web Site for Hospital Comparisons Is Faulty: Study
6. Local Blood Supply Impacted by Wednesdays Severe Snow Storm
7. Severe sleep apnea decreases frequency of nightmare recall
8. Severe Sleep Apnea Has Silver Lining
9. H1N1 learnings: Risk factors for severe outcomes among patients admitted to hospital with H1N1
10. Obesity -- mild or severe -- raises kidney stone risk
11. Larynx preservation treatments result in low instance of severe voice disability, nutritional dysfunction
Post Your Comments:
(Date:12/1/2015)... ... December 01, 2015 , ... Baptist Medical Center ... and is the only hospital in the region providing what is known as ... transcatheter pacing patients were revealed recently at a medical conference and published in ...
(Date:12/1/2015)... MD (PRWEB) , ... December 01, 2015 , ... ... salmon identification tests to continue the expansion of the company’s growing product line ... – for Chinook (Oncorhynchus tshawytscha) and Sockeye (Oncorhynchus nerka) – allow InstantLabs to ...
(Date:12/1/2015)... New York, NY (PRWEB) , ... December 01, ... ... cause of non-traumatic limb amputations in the United States. Podiatrists are well aware ... (failure to adopt therapeutic behaviors) are often catastrophic contributors to diseases of the ...
(Date:12/1/2015)... CA (PRWEB) , ... December 01, 2015 , ... ... Health Center of Excellence (BHCOE) today announced that the organization has awarded Education ... San Francisco, with a Distinguished Award. The award celebrates exceptional special needs providers ...
(Date:12/1/2015)... ... December 01, 2015 , ... ... for Effective Post-Affiliation Integration ,” addresses a main “pain point” for merging or ... anticipated results, once a deal is signed. This quick-read guidance suggests that ...
Breaking Medicine News(10 mins):
(Date:12/1/2015)... During the recent 2015 Transcatheter Cardiovascular ... CA , Medinol Ltd. continued to introduce ... a satellite symposium, "The BioNIR eDES: The Role ... a renowned physician panel discussed the key attributes ... Stent System and the Medinol eDES Coronary Stent ...
(Date:12/1/2015)... YORK , Dec. 1, 2015 Relmada Therapeutics, ... the treatment of chronic pain, announced today that the company ... will be held December 1-3 at the Luxe Sunset Boulevard ... Sergio Traversa , CEO of Relmada Therapeutics, will present on ... Eastern Time). . Please register at least ...
(Date:12/1/2015)... Dec. 1, 2015  InCarda Therapeutics, Inc. (InCarda), a ... of therapies for cardiovascular conditions via the inhalation route, ... in Australia . InCarda is planning ... Australia in the first half of ... medical centers in Adelaide and ...
Breaking Medicine Technology: