Relationship between shift work and peripheral total and differential leukocyte counts in Chinese steel workers

Shift workers exhibited higher peripheral total white blood cell and differential leukocyte counts compared to daytime workers.

• Shift workers had greater rates of alcohol use, smoking, poor sleep, and obesity than daytime workers.
• Total white blood cell, monocyte, neutrophil, and lymphocyte counts were elevated in shift workers.
• Increased leukocyte counts were linked to shift work when subjects were divided into quartiles.
• Smoking, obesity, and shift work were independently associated with elevated total white blood cell and differential leukocyte counts.

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