Survey methods

• Weighting survey data to get population based estimates
• The different measures of work-related illness, workplace injury and working days lost.
  • Measures of workplace injury: Definitions and formulae
  • Measures of work-related illness: Definitions and formulae
  • Measures of working days lost: Definitions and formulae
  • Presentation of estimates
• Calculation of full-day equivalent working days lost estimates and rates
  • Estimating days lost due to work-related illness
  • Converting reported working days lost into full-day equivalent working days lost
  • Converting the number of workers into the number of full-time equivalent workers
• Sampling errors and confidence intervals
  • Calculating confidence intervals around population based survey estimates
  • Reliability thresholds
  • Calculating confidence intervals around sample based survey estimates of change
  • Improving the precision of sample estimates by pooling annual data