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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

From: The connection of pollen concentrations and crowd-sourced symptom data: new insights from daily and seasonal symptom load index data from 2013 to 2017 in Vienna

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