Table 1.
Summary statistics of PISCINA II study—mean (SD) levels of exposures and proteins before and after swimming
| Before swimming | After swimming | P values | |
| n=56 | n=56 | ||
| Exposures in exhaled breath (μg/m3) | |||
| CHCl3 | 0.43 (0.30) | 11.53 (4.83) | 7.0E−20 |
| BDCM | 0.06 (0.05) | 2.49 (1.23) | 7.0E−20 |
| DBCM | 0.02 (0.03) | 0.54 (0.33) | 1.3E−19 |
| CHBr3 | 0.03 (0.02) | 0.11 (0.08) | 3.6E−16 |
| Outcome (proteins concentration in pg/mL) | |||
| CCL11 | 131.30 (30.86) | 121.72 (29.36) | 0.038 |
| CCL2 | 214.92 (86.21) | 204.52 (89.67) | 0.420 |
| CCL22 | 473.54 (195.94) | 442.82 (193.87) | 0.330 |
| CRP | 1616 (3,084.76) | 1559.74 (3,081.06) | 0.771 |
| CXCL10 | 22.75 (11.44) | 19.79 (10.27) | 0.049 |
| EGF | 33.76 (26.20) | 33.19 (34.37) | 0.213 |
| G-CSF | 12.71 (6.44) | 12.53 (6.66) | 0.864 |
| IL-17 | 4.79 (2.10) | 4.74 (1.86) | 0.877 |
| IL-1ra | 351.05 (193.27) | 424.81 (252.39) | 0.030 |
| IL-8 | 4.44 (2.77) | 3.77 (2.04) | 0.265 |
| MPO | 12 885.16 (8,998.80) | 12 829.78 (6,520.99) | 0.248 |
| Periostin | 127,536.87 (39,857.79) | 129,579.87 (41,388.81) | 0.830 |
| VEGF | 54.76 (44.71) | 52.48 (42.03) | 0.841 |
* Differences in the mean levels before and after the swimming experiment are assessed using a paired Student t -test (log-transformed exposures values were considered).
BDCM, bromodichloromethane; CCL11, C-C motif chemokine 11, CCL2 motif, chemokine (C-C motif) ligand 2; CCL22, C-C motif chemokine 22; CHBr3, bromoform; CRP, C reactive protein;, CHCl3, chloroform; CXCL10, C-X-C motif chemokine 10, DBCM, dibromochloromethane; EGF, epidermal growth factor, G-CSF, granulocyte colony-stimulating factor, IL, interleukin; MPO, myeloperoxidase; VEGF, vascular endothelial growth factor.