Table 1.
A summary of statistics including mean (95% confidence interval) and coefficient of variation (CV) of air pollutants and COVID-19 admission/mortality (calculated from the daily data) of Tehran in 2020
| Month | Parameter | Admission | Death | O3 (ppb) |
PM2.5 (µg/m3) |
PM10 (µg/m3) |
AQI | Temperature (℃) |
Relative humidity (%) |
|---|---|---|---|---|---|---|---|---|---|
| March | Mean | 479 (445, 512) | 63 (59, 68) | 36 (33, 38) | 22 (17, 26) | 51 (42, 60) | 69 (61, 76) | 13 (12, 14) | 41 (35, 47) |
| CV | 0.20 | 0.22 | 0.20 | 0.64 | 0.51 | 0.32 | 0.24 | 0.40 | |
| April | Mean | 419 (384, 455) | 34 (30, 37) | 36 (32, 40) | 19 (17, 20) | 45 (39, 50) | 63 (59, 68) | 15 (14, 17) | 48 (42, 55) |
| CV | 0.23 | 0.31 | 0.30 | 0.24 | 0.36 | 0.20 | 0.29 | 0.37 | |
| May | Mean | 283 (262, 304) | 16 (14, 17) | 48 (44, 53) | 23 (20, 26) | 65 (57, 74) | 77 (69, 85) | 24 (23, 26) | 26 (22, 30) |
| CV | 0.21 | 0.28 | 0.27 | 0.35 | 0.37 | 0.30 | 0.20 | 0.43 | |
| June | Mean | 334 (300, 368) | 21 (19, 24) | 62 (58, 66) | 26 (24, 28) | 75 (69, 80) | 92 (85, 99) | 30 (29, 30) | 18 (15, 20) |
| CV | 0.29 | 0.35 | 0.18 | 0.19 | 0.20 | 0.22 | 0.08 | 0.41 | |
| July | Mean | 523 (479, 567) | 34 (31, 36) | 72 (68, 75) | 27 (25, 29) | 72 (66, 79) | 112 (104, 120) | 31 (30, 32) | 21 (19, 24) |
| CV | 0.24 | 0.24 | 0.14 | 0.16 | 0.25 | 0.21 | 0.07 | 0.27 | |
| August | Mean | 394 (329, 458) | 14 (11, 18) | 64 (60, 68) | 24 (23, 26) | 78 (72, 85) | 90 (84, 96) | 29 (28, 30) | 27 (24, 29) |
| CV | 0.46 | 0.69 | 0.16 | 0.14 | 0.22 | 0.18 | 0.10 | 0.26 | |
| Total | Mean | 406 (384, 427) | 31 (28, 33) | 53 (50, 55) | 23 (22, 24) | 64 (61, 68) | 84 (80, 87) | 24 (23, 25) | 30 (28, 32) |
| CV | 0.36 | 0.64 | 0.33 | 0.29 | 0.35 | 0.31 | 0.33 | 0.53 |