Quantcast
Channel: Grammar & Sentence Structure
Viewing all articles
Browse latest Browse all 80943

What does "below unity" mean?

$
0
0
Context: Abstract BACKGROUND: Most studies on the association between lung cancer and air pollution have investigated mortality. There have been few studies of lung cancer incidence. METHODS: We used data from the ongoing Netherlands Cohort Study on Diet and Cancer for 114,378 subjects with follow-up from September 1986 to December 1997. Exposure to black smoke, nitrogen dioxide (NO2), sulfur dioxide (SO2), and particulate matter < or =2.5 microm (PM2.5) and traffic intensity variables (intensity on nearest road, intensity in a 100 m buffer, and an indicator variable for living close to a major road) were estimated at the home address. We conducted Cox proportional hazard analyses in the full cohort adjusting for age, sex, smoking...

Viewing all articles
Browse latest Browse all 80943

Trending Articles



<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>