Table 5.

Setting-specific effects and effect modification (by setting) of perceived ease of transmission on the adoption of social distancing measures. The models have been adjusted for all covariates.

Settings and variables			Types of social distancing
			Model 4.2						Model 5.2						Model 6.2
			Generala (n=3431)						Contactb (n=3431)						Workc (n=2160)
				aORd (95% CI)		P value			aOR (95% CI)			P value			aOR (95% CI)			P value
Hong Kong
	Difficulte			Reference		N/Af			Reference			N/A			Reference			N/A
	Easyg			1.15 (0.77-1.74)		.50			1.00 (0.58-1.71)			.99			0.61 (0.37-1.03)			.07
United Kingdom
	Difficult			Reference		N/A			Reference			N/A			Reference			N/A
	Easy			2.00 (1.57-2.55)		<.001			1.80 (1.41-2.30)			<.001			1.34 (0.96-1.87)			.09
Effect modificationh			1.73 (1.07-2.79)		.02			1.81 (1.00-3.28)			.05			2.18 (1.18- 4.04)			.01

^aGeneral: avoiding going to crowded areas and social events and going out.

^bContact: avoiding contacting individuals who had a fever or respiratory symptoms and had been to Wuhan in the past one month (Hong Kong) or affected areas in the past 14 days (United Kingdom).

^cWork: avoiding going to work.

^daOR: adjusted odds ratio.

^eFor perceived ease of transmission, “difficult” means that the virus cannot be transmitted by face-to face conversation with someone who has SARS-CoV-2 but no symptoms.

^fN/A: not applicable.

^gFor perceived ease of transmission, “easy” means that the virus can be transmitted by face-to face conversation with someone who has SARS-CoV-2 but no symptoms.

^hMeasures the difference of the effect being considered due to difference in setting; its value is the ratio of the two setting-specific effects.