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. Author manuscript; available in PMC: 2020 Dec 1.
Published in final edited form as: Ann Epidemiol. 2019 Oct 17;40:21–27.e3. doi: 10.1016/j.annepidem.2019.10.001

Table 1.

Comparison of types of clustering across study year and key socio-demographic characteristics.

Non-Clustered
(Neither
Geospatially nor
Genotypically
clustered)
Geospatially
clustered only
Genotypically
clustered
only
Recent, local
Transmission
(Geospatially AND
Genotypically
clustered)
N (%) N (%) N (%) N (%) P-value
Total Sampled 559 (45) 199 (16) 253 (20) 224 (18)
Gender
Male 318 (43) 108 (15) 160 (22) 148(20) 0.02
Female 241 (48) 91 (18) 93 (19) 75 (15)
Race/Ethnicity
Non-Hispanic White 182 (64) 29 (10) 55 (19) 19 (7) <0.0001
Non-Hispanic Black 124 (25) 95 (19) 104 (21) 173 (35)
Asian 179 (59) 47 (15) 60 (20) 18 (6)
Hispanic 62 (51) 23 (19) 25 (20) 12 (10)
Other 12 (43) 5 (18) 9 (32) 2 (7)
Nativity
U.S.-born 235 (35) 91 (13) 166 (24) 188 (28) <0.0001
Foreign-born 324 (59) 108 (20) 86 (16) 35 (6)

P-value corresponds to a chi-square test examining whether the distribution of cluster type differs by each socio-demographic variable. The proportions reflect row proportions.

Example: Males are more likely to be non-clustered (43%) compared to geospatially clustered alone (15%).