Biel Rita

Standardized electronic pre-diagnostic information is routinely collected in Alberta, Canada. ARTSSN is an automated real-time surveillance data repository able to rapidly refresh data that include school absenteeism information, calls about health concerns from Health Link Alberta; a provincial telephone service for health advice and information, and emergency department visits categorized by standardized chief complaint. Until recently, real-time ARTSSN data for public health surveillance and decision making has been underutilized.

Objective

We developed early warning algorithms using data from ARTSSN and used them to detect signatures of potential pandemics and provide regular weekly forecasts on influenza trends in Alberta during 2012-2014.

Syndromic surveillance uses pre-diagnostic data to inform communicable disease prevention and control. Among health zones in the province of Alberta, Canada, practices employed by public health when using elementary school illness-cause absenteeism data vary widely.

Objective

The objective of this study was to carry out a mixed-methods evaluation of the ability of standardized supports to improve the usefulness of school absenteeism syndromic surveillance for public health in Alberta.

Rates of student absenteeism in schools have been mainly used to detect outbreaks in schools and prompt public health action to stop local transmission. A report by Kim Mogto et al.  stated that aggregated counts of school absenteeism (SAi) were correlated with PPFluA, but the sample may have been biased. The purpose of this study was to assess the correlation between aggregated rates of SAi and PPFluA for two cities, Calgary and Edmonton, in Alberta. In such situations, SAi could potentially be used as a proxy for PPFluA when there are not enough samples for stable laboratory estimates.

Objective

To assess the correlations between weekly rates of elementary school absenteeism due to illness (SAi) and percent positivity for influenza A from laboratory testing (PPFluA) when conducted at a city level from September to December over multiple years.