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Table 1 SLI values in different years (2013–2017) through different pollen seasons (alder, birch and grass) are shown for the three selected areas within Vienna (“Vienna East”, “Vienna Center” and “Vienna West”) in combination with their respective average for Vienna

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

Region

Year

SLI/SPIn alder

SLI/SPIn birch

SLI/SPIn grasses

Vienna Average

2013

2.4/2679

6.4/4517

3.8/3107

Vienna East

 

2.3

6.2

3.9

Vienna Center

 

2.4

6.4

3.7

Vienna West

 

2.6

6.6

3.8

Vienna Average

2014

3.6/2883

5.1/6916

4.1/2031

Vienna East

 

3.4

4.7

4.1

Vienna Center

 

3.5

5.3

4.0

Vienna West

 

4.0

5.3

4.1

Vienna Average

2015

2.8/760

5.6/4992

4.3/3264

Vienna East

 

2.6

5.6

4.3

Vienna Center

 

2.5

5.6

4.2

Vienna West

 

3.2

5.5

4.3

Vienna Average

2016

3.9/2685

5.2/9233

4.2/2522

Vienna East

 

3.7

5.1

4.2

Vienna Center

 

4.0

5.3

4.3

Vienna West

 

4.0

5.2

4.0

Vienna Average

2017

4.1/1477

4.8/3497

4.0/2517

Vienna East

 

4.0

4.8

3.9

Vienna Center

 

3.9

4.3

3.9

Vienna West

 

4.3

5.0

4.4

  1. The SPIn was calculated for the observed time period and is shown for Vienna with the average SLI. The arrows indicate the change of the SLI (left) and the SPIn (right) compared to the previous year. Note the inconsistency between the increase/decrease of SLI and SPIn in most of the cases, especially in the birch and the grass pollen seasons