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Table 2 Blood lead (µg/L) in a sample of the Kinshasa population. Kinshasa Lead Study, DR Congo, 2003-2004

From: Blood lead levels in the Kinshasa population: a pilot study

  N Blood lead (95% CI)* p **
Total 485 120 (115-125)  
Men 268 127 (119-134) 0.01
Women 217 114 (107-121)  
Age (years)    
0 - 5 100 124 (114 - 133) 0.26
6 - 17 98 125 (116-133)  
18 - 29 114 115 (103 - 126)  
30 - 39 86 113 (101-125)  
40 and more 87 127 (112 - 142)  
Occupational groups    
1: teachers, librarians... 38 85 (67 - 104) <0.001
2: doctors, (male) nurses... 52 98 (85 - 111)  
3: shopkeepers/storekeepers/retailers/traders... 97 97 (85 - 109)  
4: car mechanics/garage owners, car drivers, gas pump attendants, conveyors. 100 159 (139-179)ϕ  
  1. * Geometric mean, CI: Confidence Interval ** T-test or ANOVAϕ Significant difference from controls (Dunnett's test)