Table 1.

The distribution of the categorical variables from these analyses, all numbers are farm years

		Testing interval
	Unit	All herds		1 year		2,3 year		4 year
		Non-TB	TB	Non-TB	TB	Non-TB	TB	Non-TB	TB
Country	England	373849	9068	91768	6607	52630	1491	187359	284
	Wales	102840	2400	25107	1539	20908	539	95854	131
	Scotland	95854	131	0	0	0	0	34143	52
Herd type	Beef	213231	3566	44569	2649	24199	552	124649	132
	Fatt’	58847	1163	10286	764	6133	181	37872	115
	Suckler	167501	2770	31721	1927	22144	515	92457	102
	Dairy	113234	3807	26576	2618	18435	728	51255	96
	Store	19730	293	3723	188	2627	54	11123	22
Herd size	0 – 10	137438	427	27406	320	17158	61	78065	18
	11 – 100	242294	4021	51514	2984	31853	660	130805	90
	>100	192811	7151	37955	4842	24527	1309	108486	359
Irish imports	0	567291	11505	116560	8116	73312	2019	312810	423
	>0	5252	94	315	30	226	11	4546	44
History	No	556467	9744	103245	6430	72053	1923	317053	464
	Yes	16076	1855	13630	1716	1485	107	303	3
High risk moves	0	290232	393	15031	164	9958	39	246715	147
	1-10	102995	923	22602	622	14758	122	45405	62
	>10	179316	10283	79242	7360	48822	1869	25236	258
FMD	No	561173	11296	114834	7958	72219	1970	310725	448
	Yes	11370	303	2041	188	1319	60	6631	19
Badgers	Mean prob'	0.259	0.281	0.293	0.295	0.283	0.286	0.223	0.219
Block Totals		572543	11599	116875	8146	73538	2030	317356	467