Attrition

• Attrition: wave on wave incremental loss of sample members
  • Wave 1 response rate: 95% of eligible adults
    (in 74% of sampled households)
  • Wave 1-2 response rate: 87.7%
  • Wave 2-3 response rate: 90%
  • Wave 3-4 response rate: 95%
  • ...
  • This is cumulative: by wave 11, nearly 40% of full respondents at wave 1 have been ``lost'' for one cause or another.

Figure 1: Status of Wave 1 full respondents in subsequent waves