Table 2

Estimated temporal trends per campaign for respirable dust and quartz exposures for three time periods adjusted for random effects of site, job and worker

Respirable dustRespirable quartz
PeriodSites (n)Observation (n)Trend
(%)
CI
(95%)
Sites (n)Observation (n)Trend
(%)
CI
(95%)
All15425 539−4.6***−4.8 to −4.314922 593−2.1***2.3 to − 1.8
Summer2002–summer2008699686−7.4***−8.3 to −7.1668416−4.0***4.1 to − 3.3
Winter2008–summer20121258786−1.8***−2.8 to −0.91197980+4.1 *** +2.6 to + 5.3
Winter 2012–summer 20161067067−7.1***−8.8 to −6.0996197−8.7 ***11.0 to − 7.2
  • ***p<0.001.