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 |
Sex | Â | Â | Â | Â |
Male | 61.1 | 58.8 | 1.1*** | 1.1, 1.2 |
Female | 38.9 | 41.2 | reference | reference |
Age at wave 1 interview, year | Â | Â | Â | |
<=24 | 3.5 | 6.7 | 2.2*** | 1.9, 2.5 |
25 - 44 | 46.2 | 56.0 | 1.8*** | 1.7, 2.0 |
45 - 64 | 45.9 | 32.7 | 1.0 | 0.9, 1.1 |
> = 65 | 4.3 | 4.7 | reference | reference |
Race | Â | Â | Â | Â |
Non-Hispanic black | 10.2 | 15.0 | 1.8*** | 1.7, 1.9 |
Hispanic | 11.6 | 16.2 | 1.5*** | 1.4, 1.6 |
Asian | 5.8 | 9.4 | 16*** | 1.4, 1.7 |
Other-multi-racial | 3.5 | 5.4 | 1.3*** | 1.2, 1.5 |
Non-Hispanic white | 68.8 | 54.0 | reference | reference |
Total household Income in 2002, $ | Â | Â | Â | |
<25,000 | 9.1 | 15.2 | 1.3*** | 1.3, 1.4 |
25,000- < 50,000 | 19.7 | 25.1 | 1.1** | 1.1, 1.2 |
50,000- < 75,000 | 21.9 | 19.8 | 0.9 | 0.9, 1.0 |
75,000- < 150,000 | 37.1 | 29.0 | 0.9** | 0.9, 1.0 |
> = 150,000 | 12.3 | 10.9 | reference | reference |
Education | Â | Â | Â | Â |
High school and below | 22.6 | 29.2 | 1.4*** | 1.3, 1.5 |
College | 57.0 | 54.6 | 1.2*** | 1.1, 1.2 |
Post-graduate | 20.4 | 16.2 | reference | reference |
Study recruitment source | Â | Â | Â | |
List-identified | 26.3 | 36.7 | 1.7*** | 1.7, 1.8 |
Self-identified | 73.7 | 63.4 | reference | reference |
Eligibility group | Â | Â | Â | Â |
Lower Manhattan resident | 14.0 | 20.0 | 1.6*** | 1.5, 1.7 |
Lower Manhattan area worker | 34.0 | 33.1 | 1.2*** | 1.1, 1.2 |
Passersby on 9/11 | 5.1 | 6.1 | 1.3*** | 1.2, 1.4 |
Otherb | 0.2 | 0.2 | 0.8 | 0.5, 1.2 |
Rescue/recovery worker | 46.6 | 40.7 | reference | reference |