Table 2.

30-day mortality in relation to the characteristics of the population (as in Table 1, episodes are considered as first, second and overall within the cohort).

Characteristic		Episode 1				Episode 2				All episodes
		n	Deaths within 30 days		P value	n	Deaths within 30 days		P value	n	Deaths within 30 days		P value
			n	%			n	%			n	%
Age at initial palliative radiotherapy	⩽50	847	85	10.04	0.110	275	40	14.55	0.084	1273	141	11.08	0.010
	51–60	1766	212	12.00		490	70	14.29		2529	327	12.93
	61–70	3051	382	12.52		769	116	15.08		4197	547	13.03
	71–80	3439	438	12.74		736	92	12.50		4503	573	12.72
	>80	1993	219	10.99		355	33	9.30		2470	258	10.45
Sex	Male	6053	795	13.13	<0.001	1478	215	14.55	0.045	8244	1110	13.46	<0.001
	Female	5042	541	10.73		1147	136	11.86		6727	736	10.94
IMD category	Most deprived	2663	332	12.47	0.148	574	87	15.16	0.079	3501	459	13.11	0.025
	4	2194	283	12.90		515	82	15.92		2955	390	13.20
	3	1849	233	12.60		425	53	12.47		2466	313	12.69
	2	2318	267	11.52		565	65	11.50		3157	367	11.62
	Most affluent	1841	191	10.37		504	56	11.11		2606	278	10.67
	Unknown	231	30	12.99		42	8	19.05		287	39	13.59
Site of primary	Multiple and Other	3997	479	11.98	<0.001	852	108	12.68	<0.001	4542	643	14.16	<0.001
	Lung	3070	489	15.93		548	133	24.27		3770	652	17.29
	Breast	1378	92	6.68		478	32	6.69		2186	152	6.95
	Prostate	1232	89	7.22		533	41	7.69		2154	161	7.47
	Colorectal	631	72	11.41		120	22	18.33		778	99	12.72
	Oesophagus	414	50	12.08		50	6	12.00		468	59	12.61
	Bladder	374	65	17.38		44	9	20.45		431	80	18.56
Site of irradiation	Multiple	892	173	19.39	<0.001	285	46	16.14	<0.001	1339	242	18.07	<0.001
	Bone	3321	460	13.85		1294	163	12.60		5379	715	13.29
	Brain	704	71	10.09		106	19	17.92		846	95	11.23
	Chest	3224	381	11.82		337	73	21.66		3628	467	12.87
	Soft tissue	2901	241	8.31		576	46	7.99		3691	313	8.48
	Unknown	54	10	18.52		27	4	14.81		89	14	15.73
Fraction group	1	4813	873	18.14	<0.001	1759	259	14.72	<0.001	7558	1265	16.74	<0.001
	2–4	1503	166	11.04		157	31	19.75		1706	203	11.90
	5	1763	235	13.33		585	54	9.23		3547	309	8.71
	6–9	299	16	5.35		24	2	8.33		325	18	5.54
	⩾10	1718	46	2.68		100	5	5.00		1836	51	2.78
Year of treatment	2004	1636	187	11.43	0.745	272	35	12.87	0.865	1982	232	11.71	0.719
	2005	1489	197	13.23		386	51	13.21		2071	278	13.42
	2006	1430	178	12.45		362	56	15.47		1990	258	12.96
	2007	1345	161	11.97		340	40	11.76		1847	224	12.13
	2008	1535	181	11.79		330	42	12.73		2024	240	11.86
	2009	1498	186	12.42		399	50	12.53		2086	257	12.32
	2010	1666	186	11.16		398	59	14.82		2274	273	12.01
	2011	497	60	12.07		138	16	11.59		698	84	12.03
Total		11,096	1336	12.04		2625	351	13.37		14,972	1846	12.33