. 2015 Dec 1;9:24–34. doi: 10.1016/j.nmni.2015.11.004

Table 1.

Characteristics of 1878 study participants

Description	Category	n	%
Participation in the cohort study	At 1 time point only	427	22.7
	At 2 time points	283	15.1
	At all 3 time points	1168	62.2
Sex	Female	1096	58.4
	Male	782	41.6
Age distribution	<20 years	107	5.7
	21–30 years	387	20.6
	31–40 years	240	12.8
	41–50 years	423	22.5
	51–60 years	384	20.4
	61–70 years	163	8.7
	71–80 years	132	7.0
	≥81 years	41	2.2
	Unknown	1	0.1
Country of birth	Germany	1544	82.2
	Country other than Germany	237	12.6
	Unknown	97	5.2
Household size	1 person	307	16.4
	2 persons	661	35.2
	3 persons	366	19.5
	≥4 persons	522	27.8
	Unknown	22	1.2
Pets present in household	Yes	738	39.3
Employment in healthcare sector	Yes	205	10.9
Regular contact with medical personnel	Yes	162	8.6
Occupational direct contact with livestock or meat	Yes	61	3.2
Regular contact to persons with livestock-related employment	Yes	80	4.3
Smoker	Yes	560	29.8
Travel abroad	No	708	37.7
	Other European countries	1116	59.4
	Africa	75	4.0
	Asia	70	3.7
	Australia	14	0.7
	Canada	7	0.4
	United States	47	2.5
	South or Middle America	24	1.3
Colonization with Staphylococcus aureus	At 1 time point only^a	123 of 427	28.8
	At 2 time points^a	120 of 283	42.4
	At all 3 time points^a	525 of 1168	44.9
	Total^a	768 of 1878	40.9
Colonization with Enterobacteriaceae	At 1 time point only^a	98 of 427	23.0
	At 2 time points^a	90 of 283	31.8
	At all 3 time points^a	440 of 1168	37.7
	Total^a	628 of 1878	33.4
Colonization with nonfermenting pathogen	At 1 time point only^a	3 of 427	0.7
	At 2 time points^a	11 of 283	3.9
	At all 3 time points^a	55 of 1168	4.7
	Total^a	69 of 1878	3.7

Nasal colonization with (group of) microorganism(s) mentioned in at least one sample of participant; persons who participated at one time point provided only one nasal swabs; those who participated at two time points had two swabs; and those who participated at three times had three swabs.