Buchan Sarah A, Kwong Jeffrey C
Dalla Lana School of Public Health (Buchan, Kwong), University of Toronto; Institute for Clinical Evaluative Sciences (Kwong); Department of Family and Community Medicine (Kwong), University of Toronto, Toronto, Ont.
CMAJ Open. 2016 Aug 19;4(3):E455-E462. doi: 10.9778/cmajo.20160050. eCollection 2016 Jul-Sep.
Past studies have reported influenza vaccination coverage below national targets, but up-to-date estimates are needed to understand trends and to identify areas for intervention. The objective of this study was to describe recent trends in influenza vaccination in Canada, timing of uptake and reasons for not receiving the vaccine.
We pooled data from the 2007 to 2014 cycles of the Canadian Community Health Survey. Using bootstrapped survey weights, we examined influenza vaccine coverage by various groups, including by age and by presence of chronic medical conditions.
The overall sample included 481 526 respondents. Across all survey cycles combined, 29% of respondents reported receiving seasonal influenza vaccination in the past 12 months. Coverage levels were fairly consistent during the study period, but varied by province or territory. Vaccination coverage decreased over time among those aged 65 years and older. Among those who received a vaccination, it was most common to do so in October or November. Among those not vaccinated, the most frequently cited reason was believing it was unnecessary.
Influenza vaccination coverage continues to fall below national targets, with substantial declines seen among those aged 65 years and older, a group for which vaccination is particularly important. More intensive efforts are needed to improve coverage in Canada, particularly for high-risk groups.
过去的研究报告显示流感疫苗接种率低于国家目标，但需要最新的估计数据来了解趋势并确定干预领域。本研究的目的是描述加拿大近期流感疫苗接种的趋势、接种时间以及未接种疫苗的原因。
我们汇总了2007年至2014年加拿大社区健康调查的数据。使用自加权抽样调查权重，我们按不同群体（包括年龄和慢性疾病状况）检查了流感疫苗接种率。
总体样本包括481526名受访者。在所有调查周期中，29%的受访者报告在过去12个月内接种了季节性流感疫苗。在研究期间，接种率相当稳定，但因省份或地区而异。65岁及以上人群的接种率随时间下降。在接种疫苗的人群中，10月或11月接种最为常见。在未接种疫苗的人群中，最常提到的原因是认为没有必要。
流感疫苗接种率继续低于国家目标，65岁及以上人群的接种率大幅下降，而该群体接种疫苗尤为重要。加拿大需要加大力度提高接种率，特别是针对高危人群。
