Figure 4.

Effect of smoking status on PLA2 and sPLA2 activity. The smoking status of 81 healthy controls, 80 patients with benign disease and 169 patients with breast cancer were collected. (A) Effect of different smoking histories on PLA2 and sPLA2 activity. (B) Effect of exposure to secondhand smoke on PLA2 and sPLA2 activity. The majority of the patients in the present study were non-smokers. One-way analysis of variance was used to assess the differences between the three groups. No statistical significance was identified. PLA2, phospholipase A2; sPLA2, secretory phospholipase A2; BD, benign disease; BC, breast cancer (P<0.05 was considered to indicate a statistically significant difference).