Table 3. Multivariate association between covariates and all cause mortality.

	Adjusted for other covariates
Predictor	HR	95% CI
Age (10 years)	1.15	1.05–1.27	P=0.004
Carstairs category
1 (most affluent)	1.0
2	0.86	0.56–1.32	P=0.486
3	1.03	0.69–1.54	P=0.878
4	1.23	0.81–1.86	P=0.333
5	1.04	0.66–1.65	P=0.851
6/7 (most deprived)	1.27	0.82–1.97	P=0.353
Charlson's index (at 2.4 years)
0–2	1.0
3–5	1.21	0.83–1.78	P=0.325
6+	1.59	1.14–2.21	P=0.006
Number of prescriptions at diagnosis
0	1.0
1–2	0.75	0.46–1.23	P=0.253
3–5	0.56	0.22–1.22	P=0.143
6+	0.44	0.16–1.18	P=0.104
Tumour grade
1
2	2.49	1.24–4.98	P=0.010
3	4.03	2.01–8.08	P<0.001
Unknown	2.22	0.89–5.54	P=0.089
Oestrogen receptor status
Positive	1.0
Negative	1.96	1.46–2.62	P<0.001
Unknown	1.47	1.10–1.97	P=0.009
Pathological nodes
Negative	1.0
Positive	2.05	1.54–2.72	P<0.001
Unknown	2.19	1.57–3.04	P<0.001
Propensity score	0.01	0.00–3.30	P=0.106
Duration of tamoxifen (at 2.4 years)	0.85	0.83–0.87	P<0.001
Adherence <80% (at 2.4 years)	1.10	1.001–1.21	P=0.046