Research Article
Development of a Physiological Frailty Index for the World Trade Center General Responder Cohort
Table 6
Prevalence of frailty (stratified by demographic characteristics) within the study sample.
| Variable | Strata | % with WTC FI-Lab ≥ 0.25 | value (chi-square test) |
| Age group at index visit | 40–45 | 6.7 | <0.0001 | 46–50 | 8.5 | 51–55 | 11.4 | 56–60 | 16.6 | 61–65 | 21.0 | >65 | 24.6 |
| Sex | Male | 12.6 | 0.0519 | Female | 10.6 |
| Race | White | 11.3 | <0.0001 | Black | 17.4 | Hispanic | 11.6 | Other | 10.1 |
| Pre-9/11 occupation | Construction | 13.9 | <0.0001 | Protective | 9.8 | Other | 15.8 | CM and IRG | 13.3 |
| Education | Higher than HS | 11.6 | 0.0096 | HS or lower | 13.8 |
| Enrollment year | 2002–2005 | 12.5 | 0.7717 | 2006–2008 | 12.1 | >2008 | 11.9 |
| WTC exposure severity | Low | 13.2 | 0.5677 | Medium | 12.2 | High/very high | 11.8 |
| Smoking status at index visit | Current | 20.6 | <0.0001 | Former | 14.1 | Never | 10.3 |
| Year of index visit | 2012 | 11.2 | 0.2378 | 2013 | 11.9 | 2014 | 12.7 | 2015 | 14.3 | 2016 | 14.6 |
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