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Table 1 Demographic Characteristics of CWP and Control Groups

From: Alterations of serum biomarkers associated with lung ventilation function impairment in coal Workers: A cross-sectional study

Subjects Numbers Age
(yr, Mean ± SD)
Exposure duration
(yr, Mean ± SD)
CWP 34 58.2 ± 5.7 26.6 ± 5.4
Group 0+ 11 57.0 ± 5.0 28.5 ± 7.4
Asymptomatic miners 24 57.8 ± 5.9 27.5 ± 6.8