Table 2.

Correlations between emission and droplet concentrations and bacterial size in the high (400 kPa) and low (200 kPa) pressure and high (95 cm) and low tank (46 cm) scenarios

Net emission concentration: flushometer operated at different pressure levels or in different cistern tanks		Correlation coefficient (r)	P‐valuea
	Droplet concentration
High pressure		0.944	<.001
Low pressure		0.803	<.001
High tank		0.885	<.05
Low tank		0.707	>.05
	Types of bacteria of different bacterial sizes
High pressure		−0.919	<.001
Low pressure		−0.936	<.001
High tank		−0.967	<.05
Low tank		−0.924	<.05

^aDenotes statistical significance at P‐value<.05.

This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.