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Duration of study participation and five study-average metrics of exposure
| Exposure | Construction subjects (n = 274) |
Control subjects (n = 59) |
Whole cohort (n = 333) |
|||
| Mean | SD | Mean | SD | Mean | SD | |
| Duration (years) | 5.5 | 3.4 | 5.3 | 3.2 | 5.4 | 3.4 |
| Noisy work hours | 10185 | 7204 | 0 | — | 8315 | 7446 |
| LEQ | ||||||
| TM | 87.1 | 2.9 | 70 | — | 84.1 | 7.1 |
| TB | 87.3 | 3.6 | 70 | — | 84.2 | 7.3 |
| Hybrid | 88.9 | 4.6 | 70 | — | 85.5 | 8.3 |
| Peakiness | 49 | 12.9 | 1 | — | 40.1 | 22 |
