Table 1

Comparison of demographic factors in case and control circles

	Totals			Pair 1		Pair 2		Pair 3		Pair 4		Pair 5
	Case circles	Control circles	All circles	Case	Control	Case	Control	Case	Control	Case	Control	Case	Control
IMD (percentiles)
25th	15.58	15.86	15.74	16.13	16.06	18.92	15.58	13.14	8.81	12.26	16.64	16.07	18.36
50th	28.79	29.53	29.24	33.08	28.34	35.76	31.18	21.90	20.33	23.53	29.98	26.58	30.94
75th	47.40	45.62	46.59	53.20	45.52	51.13	42.70	35.71	33.75	42.88	51.54	42.72	44.62
Male (%)	49.05	48.96	49.00	48.52	48.89	48.93	49.00	49.76	49.17	49.43	49.06	48.63	48.55
Age
Mean	41.40	41.57	41.48	41.19	41.46	41.11	41.53	41.54	41.65	41.82	41.48	41.68	41.82
SD	12.04	12.05	12.05	12.00	11.98	11.95	11.91	12.14	12.10	12.30	12.14	11.93	12.11
Population (/100 000)	26.57	25.72	52.29	3.89	2.25	10.18	5.89	3.75	2.83	5.22	10.48	3.53	4.27
Population density (people per hectare)	27.45	24.39	25.92	8.75	5.05	36.49	34.07	30.50	28.41	35.78	33.97	25.75	20.43
Not born in UK (%)	9.23	7.97	8.60	3.00	2.87	16.50	11.24	13.01	8.55	9.94	14.78	3.72	2.40
Single-person household (%)	17.84	16.80	17.32	14.56	12.69	18.65	16.20	16.52	16.48	23.39	24.41	16.09	14.23
HE qualifications (%)	15.20	15.31	15.25	15.17	11.78	16.62	13.63	16.73	17.73	17.62	21.42	9.87	11.97
Unemployment (%)	4.78	4.67	4.72	4.98	4.20	5.71	5.32	3.96	4.00	5.25	5.02	3.99	4.81