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. 2022 Nov 19;19(22):15313. doi: 10.3390/ijerph192215313

Table 1.

Calculated case number scenarios for study groups.

Mensink et al. (2016) [47]
German Norm
Population (18–69 Years)
Wirnitzer et al. (2021) [98]
Austrian Secondary Level
Pupils (10–19 Years)
Wirnitzer et al. (2022) [99]
Austrian Secondary
Teachers/Principals
(20–65 Years)
Confidence level 95% 95% 95%
Alternative Hypothesis 2-sided interval 2-sided interval 2-sided interval
Expected proportion (%) 6.5% 15.1% 9.45%
Margin of Error (ME; distance from proportion to limit) 2.5% 2.5% 2.5%
Power (accepted min. 80%) 96% (0.96) 91% (0.91) 100% (0.1)
Number per cell per stratum 374 788 526