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Table 2 Wave 1 health and disaster exposure and their associations with dropping-out of wave 3

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

 

Wave 3 participants

Wave 3 non-participants

Likelihood of dropping out of wave 3

 

(N = 42,934) %

(N = 24,736) %

AOR a

95% CI

Health at wave 1 (Baseline)

   

New or worsening respiratory symptoms since 9/11b

    

Yes

68.0

65.9

1.0*

0.9, 1.0

No

32.1

34.2

reference

reference

PTSD > =44

    

Yes

15.2

17.9

1.1***

1.1, 1.2

No

84.8

82.1

reference

reference

Chronic diseases diagnosed since 9/11c

    

Yes

10.9

10.2

1.0

0.9, 1.0

No

89.2

89.8

reference

reference

Disaster exposure

    

Witnessed traumatic or horrific event on 9/11/01

    

Yes

37.1

37.6

1.0

1.0, 1.1

No

62.9

62.4

reference

reference

Sustained injury on 9/11/01

    

Yes

13.7

12.5

1.0

0.9, 1.0

No

86.3

87.5

reference

reference

Caught in dust cloud on 9/11/01

   

Yes

52.1

51.1

1.0

0.9, 1.0

No

47.9

49.0

reference

reference

  1. Abbreviations: AOR, adjusted odds ratio; CI, confidence interval.
  2. *P < 0.05; **P < 0.01; ***P < 0.0001.
  3. aAdjusted for all factors listed in this table and in Table 1.
  4. bEnrollees had developed one or more new or worsening respiratory symptoms (persistent cough, shortness of breath, wheezing, sinus problems, and throat irritation) since 9/11.
  5. cEnrollees reported physician diagnosis of one or more of the diseases (angina, asthma, hypertension, coronary heart disease, heart attack or other heart problems, stroke, emphysema, diabetes, and cancer) since 9/11.