Table 2 Descriptive analysis of monthly hemorrhagic stroke occurrence and average monthly meteorological and air pollution factors
From: Association between hemorrhagic stroke occurrence and meteorological factors and pollutants
Month | HS, n (%) | ICH, n (%) | SAH, n (%) | Mean temperature (°C) | Atmospheric pressure (hPa) | Humidity (%) | Insolation (hour) | PM10 (μg/m3) | NO2 (ppb) | O3 (ppb) |
|---|---|---|---|---|---|---|---|---|---|---|
Jan | 141 (9.5) | 106 (10.4) | 35 (7.6) | −3.7 | 1015.3 | 51.3 | 6.4 | 62.3 | 41.6 | 10.9 |
Feb | 122 (8.3) | 95 (9.4) | 27 (5.9) | 0.9 | 1014.7 | 50.2 | 6.1 | 62.2 | 38.5 | 13.9 |
Mar | 131 (8.9) | 77 (7.6) | 54 (11.7) | 5.2 | 1008.3 | 51.7 | 6.5 | 62.0 | 35.9 | 21.3 |
Apr | 134 (9.1) | 93 (9.2) | 41 (8.9) | 11.0 | 1004.1 | 49.9 | 7.4 | 64.2 | 37.0 | 28.7 |
May | 145 (9.8) | 91 (9.0) | 54 (11.7) | 17.9 | 1000.6 | 56.2 | 6.7 | 62.1 | 33.7 | 30.6 |
Jun | 107 (7.2) | 74 (7.3) | 33 (7.2) | 23.1 | 997.5 | 61.7 | 6.5 | 43.8 | 29.1 | 31.1 |
Jul | 103 (7.0) | 70 (6.9) | 33 (7.2) | 24.6 | 996.0 | 79.1 | 4.1 | 38.4 | 25.1 | 21.6 |
Aug | 117 (7.9) | 80 (7.9) | 37 (8.0) | 26.5 | 998.3 | 72.0 | 4.4 | 29.4 | 21.8 | 23.2 |
Sep | 121 (8.2) | 90 (8.9) | 31 (6.7) | 21.8 | 1004.2 | 64.2 | 5.3 | 32.2 | 25.9 | 19.4 |
Oct | 112 (7.6) | 66 (6.5) | 46 (10.0) | 15.7 | 1009.0 | 59.9 | 7.3 | 42.0 | 32.6 | 14.6 |
Nov | 126 (8.5) | 87 (8.6) | 39 (8.5) | 6.7 | 1010.9 | 57.1 | 5.8 | 49.3 | 35.2 | 12.1 |
Dec | 118 (8.0) | 87 (8.6) | 31 (6.7) | 0.2 | 1014.1 | 56.4 | 5.2 | 61.0 | 39.4 | 9.6 |