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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: Environ Int. 2018 Jan 8;112:287–293. doi: 10.1016/j.envint.2017.12.033

Figure 1.

Figure 1

Glutathione Peroxidase. The levels of glutathione peroxidase (GPx) changes (U/L) over the study periods (pre, mid, post Olympics) in Beijing 2008, by age, sex and smoking status (n=199). “*” indicates statistical significance, P<0.05, and the bars above and below each mean represent the 95% confidence intervals.