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Table 3 Spearman correlation coefficients among 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

VariablesSO2NO2PM10O3COTemperatureRelative humidity
SO21.00000.63440.70170.14040.4063−0.2481−0.4962
NO20.63441.00000.70080.06850.2926−0.3123−0.2382
PM100.70170.70081.00000.46230.3485−0.3225− 0.5461
O30.14040.06850.46231.0000−0.0101− 0.0380− 0.4165
CO0.40630.29260.3485−0.01011.0000−0.3223− 0.2073
Temperature−0.2481− 0.3123− 0.3225−0.0380− 0.32231.00000.3078
Relative humidity−0.4962−0.2382− 0.5461−0.4165− 0.20730.30781.0000
  1. Note: SO2 sulfur dioxide; NO2 nitrogen dioxide; PM10 particulate matter less than 10 μm in aerodynamic diameter; CO carbon monoxide; O3 ozone