An observational study to assess changes in social inequality in smoking-attributable upper aero digestive tract cancer mortality among Canadian males between 1986 and 2001

Table 2 Social inequality in UADT cancer mortality rate between the lowest and the highest neighborhood income quintile and the proportion of deaths attributable to smoking

	Social inequality		% of smoking-attributable deaths
	Rate ratio (Lowest/Highest)	Rate difference (Lowest-Highest)	Lowest ^ǂ	Highest ^ǂ	Overall
1986
Yes*	3.3	29.8	76	62	68
No**	1.7	5.7
Total	2.7	35.5
1991
Yes*	3.0	21.6	74	59	66
No**	1.5	3.9
Total	2.4	25.5
1996
Yes*	3.0	17.7	70	55	61
No**	1.6	4.1
Total	2.3	21.8
2001
Yes*	3.0	16.3	69	49	57
No**	1.3	2.4
Total	2.1	18.7

*UADT cancer mortality attributable to smoking, ** not attributable to smoking.
^ǂ Neighborhood income quintile divided in lowest = poorest, middle = poorer + middle, and highest = richer + richest.

ISSN: 1471-2458