Skip to main content

Table 1 Personal "total" dust exposure (n = 50) among cement factory workers

From: Cement dust exposure and acute lung function: A cross shift study

   Cement dust exposure
  n AMa (SD)b (mg/m3) Median (range) (mg/m3) GMc (GSD)d (mg/m3) % >TLVe
High-exposed groups
Crusher 20 48.8 (31.9) 43.2 (8.8-127.8) 38.6 (2.13) 95.0
   Cleaning 4 99.1(20.2) 93.4(81.7-127.8) 97.6(1.2)  
   Other tasks 16 36.3(19) 40.1(8.8-71.7) 30.6(1.9)  
Packing 20 44.0 (81.2) 15.7 (2.3-371.8) 18.5 (3.59) 60.0
   Cleaning 3 175.2(170.2) 80.4(73.4-371.8) 129.9(2.5)  
   Other tasks 17 20.7(20.2) 12.6(2.3-62.3) 13(2.7)  
Crusher and packing 40 46.4 (70.0) 35.9 (2.3-371.8) 26.7 (3.01) 77.5
Low-exposed group
Guards 10 0.5 (0.3) 0.4 (0.18-0.9) 0.4 (1.73) 0
  1. aArithmetic mean. bStandard deviation. cGeometric mean. dGeometric standard deviation. ePercentage of samples exceeding the Threshold Limit Value.