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Table 2 Descriptions of the day ischemic stroke, air pollution and meteorological factors in Shenzhen from 2008 to 2014

From: Association between short-term exposure to air pollution and ischemic stroke onset: a time-stratified case-crossover analysis using a distributed lag nonlinear model in Shenzhen, China

VariablesMean ± SDMinP1P5P10P25P50P75P90P95P99MaxIQR
Total cases25.03 ± 9.884.008.0012.0014.0018.0023.0031.0038.0043.0053.0095.0013.00
Male cases14.89 ± 6.551.004.006.008.0010.0014.0018.0024.0027.0035.0064.008.00
Female cases10.14 ± 4.631.002.004.005.007.009.0013.0016.0018.0024.0042.006.00
Elderly cases12.12 ± 5.511.003.005.006.008.0011.0015.0019.0022.0029.0054.007.00
Adult cases12.90 ± 5.690.003.005.006.009.0012.0016.0020.0023.0029.0042.007.00
SO2(μg/m3)11.97 ± 6.952.953.714.745.617.3510.0614.4420.3525.5037.8670.637.09
NO2(μg/m3)45.89 ± 19.9613.1318.5123.1725.9332.3041.2954.1472.1185.04116.26166.1421.84
PM10(μg/m3)55.91 ± 30.2610.8616.1421.0423.9631.4448.2974.6697.67114.17145.94182.2343.21
CO (μg/m3)1.22 ± 0.440.370.500.660.750.910.141.431.882.102.463.250.52
O3(μg/m3)53.49 ± 21.856.0216.0023.8028.8936.7349.8267.7883.7193.99111.57143.3331.04
Temperature(°C)23.03 ± 5.665.408.8012.2014.6019.0024.5027.8029.3029.8030.6032.008.80
Relative humidity(%)72.83 ± 13.3519.0032.0047.0054.0066.0075.0082.0088.0091.0097.00100.0016.00
  1. Note: SO2 sulfur dioxide; NO2 nitrogen dioxide; PM10 particulate matter less than 10 μm in aerodynamic diameter; CO carbon monoxide; O3 ozone; SD standard deviation; Px percentile of the data; IQR inter-quartile range