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Summary of incidence information using UP-3-frequency as a net exposure indicator.
| UP-3-frequencya (%) | 0.15 | 0.8 | 3.4 | 7.1 |
|---|---|---|---|---|
| SEG | Support | Others | ||
| Number of participants | 46 | 85 | 20 | 27 |
| Number of asthma cases | 0 | 3 | 1 | 3 |
| Participant-years | 190 | 405 | 85 | 105 |
| Incidence per hundred person-years | 0 | 0.8 | 1.2 | 2.8 |
a Percentage of all (routine and non-routine) samples, adjusted to 8-h values, that exceeded 3 ppb and for which no respiratory protection was used.
