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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: J Hepatol. 2016 Feb 26;64(6):1247–1255. doi: 10.1016/j.jhep.2016.02.031

Table 2.

Phylogenetic clustering by age among PWID in Vancouver, Canada.

5 year tMRCA threshold (n=699)
Number related 108 (15%)
Median cluster size (range) 2 (2-6)
Pairs (n=87*)
    Older only 58/87 (67%)
    Younger with older 16/87 (18%)
    Younger only 14/87 (16%)
Clusters (n=21)
    Older only 9/21 (43%)
    Younger with older 12/21 (57%)
    Younger only 0/21 (0%)
Among younger (n=28*)
    One younger with older 8/28 (29%)
    Two younger with older 7/28 (25%)
    Younger only 14/28 (50%)
*

One participant, aged <27 years, with HCV infection at baseline, was identified in two separate pairs.