The work history section of the questionnaire focused on occupations with potential exposure to PCDDs, PCDFs, and/or PCBs (Table 3).
Earlier epidemiological studies of the possible relationship between diesel exhaust (DE) and lung cancer focused on occupations in which the workforce worked in proximity to operating diesel engines, such as railroad workers and truck drivers (Garshick et al., 1988, 2004, 2008; Steenland et al., 1992).
There are limited studies, however, focused on occupation time of vehicles and conflicting flow in mixed traffic.
The MLTPAQ is an interview administered questionnaire, measuring leisure-time physical activities [ 41] while the TOPAQ can be either self-administered or interview based and focuses on occupation-related activities of a maximum of three jobs [ 42].
Confidence intervals and likelihood of statistical errors may also be large for certain indicators when focusing on specific occupations such as physicians or nursing and midwifery personnel, or when completeness of reporting is low.
The first part of that package comprised of the day centre staff taking part in a one-day training session focussed on meaningful occupations and occupation-based rehabilitation, perceived meaning in everyday occupations (Argentzell et al., 2012a; Leufstadius et al., 2008) and client-centred practice (Sumsion & Law, 2006).
By focusing on middle-skills occupations, we are addressing the exorbitant costs of higher education as well as helping young people acquire the skills that local employers seek.
Our study findings should be interpreted in light of the following limitations: the study sample was small, limited to one city, and focused on four occupations groups, which limits the generalizability of the findings.
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