Table 2. Survival analysis of 86 852 breast cancer cases in England 2012–2013 with follow-up to 2014.

			Model 1		Model 2		Model 3a		Model 3b		Model 3c		Model 3d		Model 4
Adjustments			Age		Age SES Region Como		Age SES Region Como Stage		Age SES Region Como Grade		Age SES Region Como Receptors		Age SES Region Como Morphology		All covariates
Ethnicity	Persons	Deaths	HR	95% CI	HR	95% CI	HR	95% CI	HR	95% CI	HR	95% CI	HR	95% CI	HR	95% CI
White	60 580	5917	1.00		1.00		1.00		1.00		1.00		1.00		1.00
Black	1193	119	1.77	1.48–2.13	1.52	1.26–1.84	1.35	1.12–1.63	1.38	1.14–1.66	1.44	1.19–1.74	1.49	1.24–1.80	1.24	1.03–1.50
Asian	1964	116	0.98	0.81–1.18	0.87	0.72–1.05	0.88	0.73–1.06	0.82	0.68–0.99	0.85	0.71–1.03	0.88	0.73–1.06	0.86	0.71–1.03
Other and unknown	23 115	2609	0.99	0.95–1.04	1.03	0.98–1.08	1.03	0.98–1.08	1.05	1.00–1.10	1.01	0.96–1.06	1.03	0.98–1.08	1.05	1.00–1.11
Heterogeneity			χ2(3)=38.4; P<0.001		χ2(3)=23.2; P<0.001		χ2(3)=13.3; P=0.004		χ2(3)=20.0; P<0.001		χ2(3)=18.3; P<0.001		χ2(3)=20.8; P<0.001		χ2(3)=12.5; P=0.006

Abbreviations: CI=confidence interval, ER=oestrogen receptor, HER2=human epidermal growth factor 2 receptor, HR=hazard ratio, PR=progesterone receptor; SES=socio-economic status.

Cox proportional regression analyses of ethnicity.

Model 1 adjusted for age.

Model 2 adjusted for age, socioeconomic status, region of residence and comorbidity.

Model 3a adjusted for age, socioeconomic status, region of residence, comorbidity and stage (missing stage as a category).

Model 3b adjusted for age, socioeconomic status, region of residence, comorbidity and grade.

Model 3c adjusted for age, socioeconomic status, region of residence, comorbidity, and ER, PR and HER2 status.

Model 3d adjusted for age, socioeconomic status, region of residence, comorbidity and morphology.

Model 4 adjusted for age, socioeconomic status, region of residence, comorbidity, stage, grade, ER, PR and HER2 status, and morphology.