Medians, IQRs and maximum values of PM2.5 measurements in halls and main entrances (outdoor) by selected characteristics, raw data (1 s average) Barcelona Metropolitan Area, 2010
| n | Hall | Main entrance (outdoor) | p Value* | |
| Median (IQR) | Median (IQR) | |||
| Number of lit cigarettes in main entrance | ||||
| <10 lit cigarettes | 32 | 16.38 (11.44–24.96) | 15.86 (9.69–24.96) | 0.285 |
| ≥10 lit cigarettes | 15 | 20.80 (11.96–27.56) | 21.58 (17.16–37.44) | 0.495 |
| Covered main entrance (outdoor) | ||||
| Quasi-outdoor | 33 | 19.24 (11.44–26.00) | 17.68 (13.00–27.56) | 0.765 |
| Outdoor | 14 | 17.68 (11.31–22.62) | 14.82 (7.67–21.65) | 0.109 |
| Signs of tobacco smoking in hall | ||||
| Yes | 25 | 18.72 (9.88–24.44) | 17.16 (10.14–23.92) | 0.440 |
| No | 22 | 17.68 (11.44–26.78) | 18.98 (10.85–35.88) | 0.961 |
| Distance to roadways | ||||
| <15 m | 36 | 19.76 (12.03–26.91) | 17.68 (12.48–28.34) | 0.539 |
| ≥15 m | 11 | 11.96 (10.92–19.24) | 16.64 (9.36–20.28) | 0.824 |
↵* Non-parametric test for medians for the comparison between hall and main entrance (outdoor).