Table 4 Odds ratios conditional to the participants’ gender, base percentage, gender additional effect, and cumulative effect in brackets.

Face mask [yes]

 − 30%***

 − 8%*** (− 38%)

 − 2%*** (− 32%)

Duration [15 min]

 + 0.03%^n.s.

 + 0.005%^n.s.

 − 0.007%^n.s.

Distance [about 1 m]

 + 7%***

 + 3%*** (+ 10%)

 − 0.005%^n.s. (+ 7%)

Environment [outdoors, open air]

 − 28%***

 − 13% (− 41%)

 − 2%*** (− 30%)

People [2 people]

 − 10%***

 − 4%*** (− 14%)

 − 1%*** (− 11%)