Table 1

Prevalence of obesity and smoking and their impact on estimated excess workdays lost per 100 Shell Oil Company employees, 1980–2009

Mid-year of each time period*
198219871992199720022007
Prevalence (%)
 Obesity14.219.927.835.438.942.4
 Smoking32.424.822.020.417.317.0
Excess workdays lost per 100 employees
 Obesity436083106117127
 Smoking655044413534
 Ratio0.661.201.902.603.373.74
  • *Prevalence and excess workday values for the mid-year of each time period (ie, 1980–1984, 1985–1989, 1990–1994, 1995–1999, 2000–2004, 2005–2009) represent an average for that period.