Online Symptoms Self-Assessment During Covid-19 Pandemic: an Analysis of a Covid-19 Portal Responses from Canada.

Background: Covid-19 case was first identified in Canada on January 25, 2020, on a Toronto resident who had travelled to Wuhan China, and not long after, the WHO declared the viral infection a pandemic. Ontario health West created an online self-assessment portal that allowed individuals in the health region and adjourning areas to report any covid related symptoms. Method: Record level data obtained the Ontario Health West self-assessment portal were analyzed. Descriptive statistics using charts and graphs were used to characterize the distribution of responses to the portal. In-depth analysis using correlation, lead-lag analysis, and trend comparison with actual Public Health Canada covid-19 cases for the region were also conducted. Results: A total of 34,144 distinct responses were recorded on the portal between April 10 and July 29, 2020, with 1,250 (3.7%) responding positively to one of the emergency symptoms questions. Trend analysis showed a peak portal response in May 2020 with a smaller rise subsequently in July 2020, coinciding with actual covid-19 peak in the region. The five most reported symptoms on the portal were sore throat (17.2%), headache (12.9%), fatigue (12.3%), digestive problems (12.2%) and cough (9.1%). For four sub-regions, trend of self-report on the portal positively lagged actual public health covid-19 cases, while for one sub-region, the trend positively led the actual public health covid-19 cases for the area. Conclusion: We found correlation between online covid-19 self- assessment data and the confirmed covid-19 cases in the Southwestern region of Ontario. Trends in the covid-19 associated emergency symptoms reported on the portal also tracked confirmed covid-19 cases in the community. Peak response to the portal coincided with the peak volume of confirmed cases in Ontario during the first wave of covid-19 pandemic in Canada, suggesting some consistency between the experiences of portal users and patterns of COVID-19 illness in the community. The portal was a useful tool at the person-level because it provided guidance to individuals about how to access appropriate health services according to the symptoms that they reported and connected them with primary care, reducing unnecessary visit to health facilities for covid-19 related care.