Table 2.

The correlation factors including p-values (and significance levels) between the daily SLI values of the defined pollen season (alder, birch and grass) in the observed time period (2013–2017) and the daily mean pollen concentrations are displayed for each of the areas in Vienna as well as for a whole region (“Pannonian Lowlands”) in comparison

Corr.-Factor sqrt/p-value	SLI alder	SLI birch	SLI grasses
Pannonian Lowlands	69.1/2.02e− 13***	69.3/1.90e− 8***	69.1/1.85e− 28***
Vienna East	59.4/9.15e− 12***	66.1/1.68e− 7***	62.2/1.77e− 21***
Vienna Center	56.4/1.71e− 10***	65.9/2.45e− 7***	61.5/8.58e− 21***
Vienna West	55.3/5.43e− 10***	67.9/4.96e− 8***	61.9/1.47e− 21***

Significance codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 “1