Tuberculosis and homelessness in Montreal: a retrospective cohort study

BMC Public Health

Table 2 Genotyping results for homeless and non-homeless persons with TB on the Island of Montreal, 1996-2007

	Homeless (n = 20)		Non-Homeless (n = 1803)		Odds Ratio or P-Value
TB Isolates Genotyped, % of Culture-Positive	20	100%	1521	95%	-
High-copy* isolates, % of Genotyped	17	85%	1257	83%	OR = 1.2 (95% CI = 0.35-4.1)
Genetically Clustered†, % of Genotyped	11	55%	286	19%	OR = 5.3 (95% CI = 2.2-13)

*Isolates with 6 or copies of the IS6110 insertion sequence; matching 'low-copy' isolates were also characterized by spoligotype
†Identical to one or more isolate by IS6110-RFLP (and spoligotype if less than 6 bands)

ISSN: 1471-2458