. 2017 Nov 16;83(23):e01489-17. doi: 10.1128/AEM.01489-17

TABLE 2.

Determinants of MRSA carriage level in nasal swabs according to multivariable analysis

Model^a	Variable	Relative carriage level (CI)^b
A	Exposure level of airborne MRSA^c	1.73 (1.70–1.77)
	Farm work (active)^d	1.55 (1.59–1.60)
	Farm work (passive)^e	1
B	Exposure level of airborne MRSA^c	1.42 (1.39–1.45)
	Smoker	0.44 (0.21–0.92)
	Nonsmoker^e	1

Model A, trials 1 and 2; model B, trials 1 to 4, excluding volunteers with pig contact.

The confidence interval (CI) for each value is shown in parentheses.

Exposure was measured in log₂-transformed CFU/m³.

Farm work with pig contact.

Reference.