Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study

Table 4 Hazard ratios for breast cancer-specific mortality risk in Māori compared with NZ European women

Characteristic	All cancers		Screen detected		Non-screen detected
Characteristic	HR (95% CI)	p	HR (95% CI)	p	HR (95% CI)	p
Model A (Unadjusted))	2.25 (1.62-3.12)	<0.001	0.77 (0.27-2.15)	0.617	2.28 (1.59-3.26)	<0.001
Model B (Age adjusted)	2.29 (1.69-3.18)	<0.001	0.80 (0.29-2.25)	0.674	2.34 (1.63-3.35)	<0.001
Model C (Model B + Year of diagnosis^a)	2.33 (1.64-3.25)	<0.001	0.84 (0.31-2.36)	0.738	2.27 (1.59-3.25)	<0.001
Model D (Model C + Screening status)	2.01 (1.44-2.80)	<0.001	-	-	-	-
Model E (Model D + Deprivation)	2.09 (1.49-2.94)	<0.001	0.85 (0.30-2.40)	0.762	2.39 (1.65-3.46)	<0.001
Model F (Model E + Urban/Rural residence)	2.11 (1.50-2.97)	<0.001	0.85 (0.30-2.41)	0.760	2.37 (1.64-3.47)	<0.001
Model G (Model F + Interaction terms^b)	1.33 (0.33-3.18)	0.964	1.45 (0.33-6.39)	0.620	3.13 (1.58-6.18)	0.001

(With stepwise adjustment for age, year of diagnosis, screening status, socioeconomic deprivation and urban/rural residential status).
(^ayear categories as in Table 1, ^b – ethnicity x deprivation, ethnicity x screening and deprivation x screening.

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