Table 1.
Distribution of confounders among custodians in study population (total n=674)
| Indicator | N | Mean | (%) | (standard deviation) | |
|---|---|---|---|---|---|
| Gender | Female (reference) | 382 | (54) | ||
| Male | 292 | (46) | |||
| Age | 20–30 | 50 | (7) | ||
| 31–40 | 91 | (13) | |||
| 41–50 | 201 | (30) | |||
| 51–60 (reference) | 234 | (34) | |||
| 61–70 | 79 | (11) | |||
| Missing | 19 | (3) | |||
| Primary Language | English (reference) | 356 | (51) | ||
| Spanish | 155 | (23) | |||
| Polish | 108 | (16) | |||
| Other language | 38 | (5) | |||
| Missing | 17 | (3) | |||
| Smoking Status | Non-smoker (reference) | 516 | (15) | ||
| Current smoker | 98 | (75) | |||
| Missing | 60 | (9) | |||
| Year | 2012 | 310 | (46) | ||
| 2014 | 364 | (54) | |||
| Work schedule | Full Time (reference) | 601 | (89) | ||
| Part Time | 57 | (8) | |||
| Missing | 16 | (2) | |||
| Shift | First (reference) | 452 | (63) | ||
| Second | 149 | (21) | |||
| Third | 93 | (13) | |||
| Type of job | State (reference) | 537 | (80) | ||
| contractor | 136 | (20) | |||
| Missing | 1 | < (1) | |||
| Site | A | 217 | (32) | ||
| B | 229 | (34) | |||
| C | 123 | (18) | |||
| D | 36 | (5) | |||
| E | 69 | (10) | |||
| Years working with cleaning products | 13 | (9) | |||