Page 4 - EN-Symptom-Survey_lores

An example of a symptom
survey we have conducted

Indoor air quality was monitored in a school in September–December 2018.
52 people participated in the survey in the first phase, and 40 people in the second phase.

RESPONSE RATES

Phase 2 10 20 30 40 50 60
Phase 1

0

The aim of the survey was to map the quality of indoor air and the MORE THAN
change achieved in three months. For each question, the response HALF FELT THAT
rate was exceptionally high, making the results as comprehensive as AIR QUALITY HAD
possible. IMPROVED AND
SYMPTOMS HAD
The situation was mapped before the air purifiers were installed and
then compared with the results of the second phase. The second phase DECREASED.
of the symptom survey was conducted 3 months after the installation
of the air purifiers. If problems with indoor air quality and the related
symptoms persist for a long time, longer monitoring may be required.
In this case, we conducted three symptom surveys to get a comparable
result over the longer term.

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