Table 1.
Descriptive statistics of daily children hand, foot, and mouth disease (HFMD) cases, meteorological variables and air pollutants in Shenzhen, China, 2009–2017.
| Variables | N | Mean | Standard Deviation | Minimum | 25% Quartile | Median | 75% Quartile | Maximum |
|---|---|---|---|---|---|---|---|---|
| Daily HFMD cases | ||||||||
| Total (0~14y) | 357,238 | 106.6 | 117.4 | 0.0 | 22.0 | 65.0 | 156.0 | 860.0 |
| Children < 1y | 50,657 | 15.4 | 20.2 | 0.0 | 2.0 | 8.0 | 21.0 | 172.0 |
| 1 ≤ Children < 3y | 185,440 | 56.4 | 63.1 | 0.0 | 11.0 | 33.0 | 83.0 | 517.0 |
| Children ≥ 3y | 121,141 | 36.9 | 43.9 | 0.0 | 8.0 | 22.0 | 48.0 | 346.0 |
| Males | 217,720 | 66.2 | 72.2 | 0.0 | 14.0 | 40.0 | 100.0 | 523.0 |
| Females | 139,518 | 42.5 | 47.7 | 0.0 | 8.0 | 25.0 | 62.0 | 353.0 |
| Scattered children | 279,478 | 85.0 | 95.5 | 0.0 | 16.0 | 49.0 | 124.5 | 738.0 |
| Nursery children | 67,000 | 20.4 | 27.3 | 0.0 | 3.0 | 10.0 | 26.0 | 269.0 |
| Meteorological variables | ||||||||
| Air pressure (hpa) | 3287 | 1005.3 | 6.4 | 986.0 | 1000.6 | 1005.1 | 1010.2 | 1027.3 |
| Temperature (°C) | 3287 | 23.3 | 5.6 | 3.5 | 19.1 | 24.6 | 28.0 | 33.0 |
| Relative Humidity (%) | 3287 | 74.3 | 13.0 | 19.0 | 68.0 | 76.0 | 83.0 | 100.0 |
| Rainfall (mm) | 3287 | 4.9 | 15.2 | 0.0 | 0.0 | 0.0 | 1.0 | 187.8 |
| Wind speed (m/s) | 3287 | 2.1 | 0.8 | 0.3 | 1.5 | 2.0 | 2.5 | 6.7 |
| Sunshine duration (h/d) | 3287 | 5.2 | 3.8 | 0.0 | 1.3 | 5.6 | 8.7 | 12.5 |
| Air pollutants | ||||||||
| SO2 (µg/m3) | 3287 | 10.3 | 5.2 | 3.0 | 7.0 | 8.9 | 12.0 | 54.8 |
| NO2 (µg/m3) | 3287 | 42.3 | 18.3 | 12.0 | 29.7 | 38.3 | 50.5 | 166.1 |
| CO (mg/m3) | 3287 | 1.1 | 0.4 | 0.4 | 0.8 | 1.0 | 1.2 | 3.3 |
| O3 (µg/m3)2009–2016 | 2922 | 55.5 | 21.7 | 11.8 | 38.3 | 51.7 | 69.9 | 143.3 |
| PM10 (µg/m3) | 3287 | 51.6 | 28.4 | 8.6 | 30.0 | 44.8 | 67.3 | 374.2 |
| PM2.5 (µg/m3)2013–2017 | 1826 | 32.1 | 19.7 | 5.6 | 16.9 | 27.7 | 42.3 | 137.1 |