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Table 2 Primary and secondary outcome measures collected at different time points

From: Protocol for a randomised controlled trial examining the impact of a web-based personally controlled health management system on the uptake of influenza vaccination rates

Outcome measure Measurement timepoints & methods
Primary outcome  
Proportion of participants obtaining influenza vaccination during the study • Study completion1 (via self-reports and clinical audit)
Secondary outcome  
Proportion of participants visiting the University Health Service during the study • Study completion1 (via self-reports and clinical audit)
Ancillary outcomes  
Proportion of participants experiencing symptoms of influenza-like illness 2 (ILI) during the study • Monthly from study commencement in May to October 2010 (via self-reports)
Proportion of participants using medications or remedy due to ILI symptoms 2 • Monthly from study commencement in May to October 2010 (via self-reports)
Proportion of participants visiting a healthcare professional due to ILI symptoms 2 • Monthly from study commencement in May to October 2010 (via self-reports)
Proportion of participants experiencing impairment in work or study due to ILI symptoms 2 • Monthly from study commencement in May to October 2010 (via self-reports)
Number of days absent from work or study due to ILI symptoms (per participant) • Monthly from study commencement in May to October 2010 (via self-reports)
Reasons for receiving (or not receiving) influenza vaccine • Study completion1 (via self-reports)
Patterns of usage and feedback of PCHMS • Study completion1 (via automatic system logs, data entered by participants into PCHMS, and self-reports)
  1. 1Estimated end of average respiratory disease and influenza season in Southern Hemisphere (i.e. October 2010, six months from study commencement)
  2. 2Defined by case definitions of influenza (fever with cough or a sore throat) issued by NSW Health and Centers for Disease Control and Prevention (CDC) as of 26 March 2010