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Table 2 Demographics of the Camp Lejeune and Camp Pendleton cohorts

From: Mortality study of civilian employees exposed to contaminated drinking water at USMC Base Camp Lejeune: a retrospective cohort study

Factor Camp Lejeune Camp Pendleton
  N = 4,647 N = 4,690
Male 42.8% 49.3%
Female 57.2% 50.7%
“white” 82.2% 78.8%
African American 15.4% 9.0%
“other” or unknown 2.4% 12.3%
Median age, start of follow-up 31 34
Median age, end of follow-up 58 60
% ≥65 yrs, end of follow-up 28.1% 37.4%
Not a high school graduate 6.8% 3.9%
High school graduate 70.6% 84.5%
College graduate 22.6% 11.7%
White Collar 69.7% 64.8%
Blue Collar 30.3% 35.2%
  % Construction Trades   15.1%   12.5%
  % Maintenance/Mechanics   8.7%   12.7%
  % Firefighters   2.5%   3.9%
  % Laundry Workers   1.3%   1.0%
  % Vehicle/Equipment Operation   1.7%   2.2%
  % Other   1.0%   2.9%
% Occupation as painter 1.1% 1.0%
% Worked with solvents 27.1% 27.7%
% Worked in food preparation 1.1% 2.2%
Median months employed, 1973-1985 29 27
Total Deaths 654 (14.1%) 869 (18.5%)
% deaths occurring >1995 69.4% 67.0%
Total lost to follow-up 62 (1.3%) 95 (2.0%)
Total person-years of follow-up 123,659 123,065