Table 3.

Regression coefficients and relative risks from the analysis of flows from Montreal CTs to MVC during the 2009 influenza pandemic mass vaccination campaign

Variable	Regression coefficient*, **	95% Credible interval
Capacity (exponent)	1·098	1·092, 1·104
Drive time (exponent)	4·13	4·12, 4·14

CT variable	Relative risk*,**	95% Credible interval
New immigrant	0·936	0·913, 0·959
Poverty	0·918	0·893, 0·946
Official languages	1·034	1·012, 1·059

MVC variable	Relative risk*,**	95% Credible interval
Material deprivation	0·649	0·645, 0·654
Violent crime rate	0·917	0·915, 0·918
Residential density	0·663	0·660, 0·666

^*Hierarchical model adjusting for driving time, clinic capacity, proportion age ≤4 years, proportion of males and unmeasured CT variables (CT random effects).

^**Relative risks compare vaccination rates at the upper to vaccination rates at the lower quartile of the CT/MVC variable (Tables 1–2).