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Table 4 Association between survey participation and enrollees’ health conditions

From: Evaluation of non-response bias in a cohort study of World Trade Center terrorist attack survivors

 

Poor/fair health at wave 2

PTSD > =44 at wave 2

Recurrent LRS b at wave 2

Wave 3 drop-outs (N = 9,868)

AORa

95% CI

AORa

95% CI

AORa

95% CI

 

1.4***

1.3, 1.4

1.2***

1.2, 1.3

1.2***

1.1, 1.3

Three-wave participants (n = 36,252)

reference

 

Poor/fair health at wave 3

PTSD > =44 at wave 3

Recurrent LRS b at wave 3

Wave 3 drop-ins (N = 6,682)

AORa

95% CI

AORa

95% CI

AORa

95% CI

 

1.3***

1.2, 1.4

1.4***

1.3, 1.5

1.2***

1.1, 1.3

Three-wave participants (n = 36,252)

reference

  1. Abbreviations: AOR, adjusted odds ratio; CI, confidence interval; PTSD, probable posttraumatic stress disorder; LRS, lower respiratory symptoms.
  2. *P < 0.05; **P < 0.01; ***P < 0.0001.
  3. aAdjusted for study recruitment source, sex, age, race, income, eligibility group, education, survey mode, and wave 1 exposure.
  4. bEnrollees who reported at least 1 of 3 symptoms - shortness of breath, persistent cough, or wheezing - for the first time at wave 1 (i.e., post-9/11) and for 8 or more days (consecutive or nonconsecutive) in the last 30 days at wave 2 or wave 3.