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Occup Environ Med 60:90-96 doi:10.1136/oem.60.2.90
  • Original article

Fluid losses and hydration status of industrial workers under thermal stress working extended shifts

Table 3

Urinary specific gravity data from the main study

Specific gravity
Start of shift Mid shift End of shift
n 39 39 39
Average 1.0252 1.0248 1.0254
SD 0.00533 0.00533 0.00686
Range 1.012–1.035 1.009–1.035 1.006–1.035
p value Start to mid = 0.85 Mid to end = 0.70 Start to end = 0.85

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