Table 2. Risk of oral and pharyngeal cancers by relative deprivation of area of residence in South Asians and non-South Asians resident in South East England, 1985–1995.

		Males		Females
Anatomical site	Deprivation quintile	Non-South Asian	South Asian	Non-South Asian	South Asian
(ICD-10)	(Carstairs)	IRR (95% CI)	IRR (95% CI)	IRR (95% CI)	IRR (95% CI)
Oral cavity (C01–C06)	1 (least deprived; reference)	1	1	1	1
	2	1.18 (1.00, 1.40)	0.84 (0.29, 2.43)	0.89 (0.75, 1.07)	0.38 (0.12, 1.15)
	3	1.35 (1.15, 1.58)	0.58 (0.20, 1.67)	0.98 (0.83, 1.16)	0.41 (0.15, 1.10)
	4	1.60 (1.37, 1.86)	0.85 (0.35, 2.07)	1.04 (0.89, 1.23)	0.63 (0.29, 1.39)
	5 (most deprived)	2.20 (1.91, 2.54)	0.77 (0.33, 1.79)	1.05 (0.90, 1.23)	0.54 (0.25, 1.13)
	Trend per quintile	1.22 (1.18, 1.26)	0.98 (0.83, 1.15)	1.03 (0.99, 1.07)	0.96 (0.82, 1.14)
	P-value from likelihood ratio test	0.105	0.736	0.436	0.234
Pharynx (C09, C10, C12–C14)	1 (least deprived; reference)	1	1	1	1
	2	1.18 (0.96, 1.46)	3.02 (0.35, 25.84)	0.96 (0.74, 1.26)	0.40 (0.07, 2.42)
	3	1.32 (1.08, 1.62)	1.24 (0.13, 11.86)	1.05 (0.81, 1.36)	0.28 (0.05, 1.65)
	4	1.67 (1.38, 2.02)	2.06 (0.27, 15.96)	1.38 (1.08, 1.74)	0.50 (0.13, 1.90)
	5 (most deprived)	2.38 (1.99, 2.84)	2.30 (0.31, 16.85)	1.57 (1.25, 1.97)	0.51 (0.15, 1.74)
	Trend per quintile	1.25 (1.20, 1.30)	1.08 (0.83, 1.40)	1.15 (1.09, 1.20)	0.97 (0.73, 1.29)
	P-value from likelihood ratio test	0.093	0.541	0.310	0.553

95% CI=95% confidence interval; IRR=age- and deprivation-adjusted incidence rate ratio.