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) | Â | Â | Â | |
New or worsening respiratory symptoms since 9/11b | Â | Â | Â | Â |
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 | Â | Â | Â | Â |
Yes | 10.9 | 10.2 | 1.0 | 0.9, 1.0 |
No | 89.2 | 89.8 | reference | reference |
Disaster exposure | Â | Â | Â | Â |
Witnessed traumatic or horrific event on 9/11/01 | Â | Â | Â | Â |
Yes | 37.1 | 37.6 | 1.0 | 1.0, 1.1 |
No | 62.9 | 62.4 | reference | reference |
Sustained injury on 9/11/01 | Â | Â | Â | Â |
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 | Â | Â | Â | |
Yes | 52.1 | 51.1 | 1.0 | 0.9, 1.0 |
No | 47.9 | 49.0 | reference | reference |