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Table 3 Comparison of health conditions at follow-up surveys among drop-ins/outs and three-wave participants

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 a at wave 2 (%)

Wave 2 participants (n = 46,120)

Wave 3 drop-outs (n = 9,868)

24.7

21.6

22.4

 

Three-wave participants (n = 36,252)

19.4

18.9

20.6

  

Poor/fair health at wave 3 (%)

PTSD > =44 at wave 3 (%)

Recurrent LRS at wave 3 (%)

Wave 3 participants (n = 42,934)

Wave 3 drop-ins (n = 6,682)

33.7

22.4

18.6

 

Three-wave participants (n = 36,252)

25.9

16.5

16.4

  1. Abbreviations: PTSD, probable posttraumatic stress disorder; LRS, lower respiratory symptoms.
  2. aEnrollees 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.
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BMC Research Notes

ISSN: 1756-0500

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