Table 1.
Mean concentration of PM2.5 by microenvironment for participants K1, K2, K3 and K4 and daily mean PM2.5 measured at fixed-site outdoor monitora for the corresponding days.
| Mean [PM2.5] in μg/m3 |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| K1 |
K2 |
K3 |
K4 |
||||||||||
| Restriction status |
% change | Restriction status |
% change | Restriction status |
% change | Restriction status |
% change | ||||||
| Pre- | During | Pre- | During | Pre- | During | Pre- | During | ||||||
| Day mean [PM2.5] (IQR) at fixed-site monitora for days of personal monitoring | 40.9 (34, 44) | 22.0 (14, 27) | −46% | 45.1 (37, 54) | 16.8 (14, 21) | −63% | 70.9 (49, 92) | 14.6 (8, 21) | −79% | 15.8 (12, 20) | 17.6 (14, 23) | 11% | |
| Outdoor | Commuting | 15.3 (14, 17) | NA | NA | 18.8 (6, 26) | NA | NA | 24.5 (2, 47) | NA | NA | 6.2 (5, 7) | NA | NA |
| Business | 24.7 (23, 26) | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Other | 24.1 (13, 33) | 16.7 (13, 19) | −31% | NA | 6.9 (6,8) | NA | 56 (29, 79) | 8.4 (3, 12) | −85% | NA | 16.4 (12, 18) | NA | |
| Indoor | Embassy | NA | NA | NA | 0 (0,0) | NA | NA | 0 (0, 1) | 0 (0, 0) | 0% | 0 (0, 0) | 0 (0,0) | 0% |
| Home – cooking | 11.2 (8, 15) | 44.6 (10, 61) | 298% | NA | NA | NA | 26 (25, 32) | 47.4 (13, 49) | 82.3% | NA | NA | NA | |
| Home – other | 0.8 (0, 1) | 0.1 (0, 0) | −88% | 0.1 (0,0) | 0.1 (0,0) | 0% | 0.9 (0, 1) | 0.4 (0, 1) | −56% | 11.4 (7, 15) | 1.5 (0, 4) | −86% | |
| Total | 6.7 (0, 7) | 3.8 (0, 0) | −51% | 0.2 (0.0) | 0.1 (0,0) | −50% | 9.5 (0, 8) | 2.3 (0, 0) | −76% | 5.8 (1, 10) | 1.0 (0, 2) | −83% | |
Note: all data related to weekday monitoring.
a
Embassy fixed-site monitor.