Table 2.
Summary statistics on daily hospital admissions for all cardiovascular diseases, cause specific major cardiovascular diseases, PM2.5 levels, and weather conditions in 184 Chinese cities, 2014-17, by geographical region
| Variable | Nationwide | North* | South* |
|---|---|---|---|
| No of cities | 184 | 90 | 94 |
| Annual average PM2.5 (μg/m3, mean (SD)) | 50 (19) | 55 (23) | 46 (13) |
| Annual standard deviation of PM2.5 (μg/m3, mean (SD)) | 34 (15) | 39 (17) | 29 (9) |
| Annual average temperature (°C, mean (SD)) | 14 (5) | 10 (4) | 18 (3) |
| Annual average relative humidity (%, mean (SD)) | 68 (12) | 57 (8) | 77 (5) |
| Daily hospital admissions (mean (SD)) | |||
| All cardiovascular diseases | 47 (74) | 51 (87) | 33 (56) |
| Ischaemic heart disease | 26 (53) | 33 (66) | 20 (35) |
| Heart failure | 1 (5) | 1 (7) | 1 (1) |
| Heart rhythm disturbances | 2 (4) | 2 (6) | 1 (1) |
| Ischaemic stroke | 14 (28) | 17 (29) | 12 (26) |
| Haemorrhagic stroke | 2 (4) | 2 (3) | 2 (5) |
PM2.5=particulate matter with aerodynamic diameter ≤2.5 μm; SD=standard deviation.
*
Southern and northern regions separated by the Huai River-Qinling Mountains line.