Table.

Isoniazid and multidrug resistance in isolates from patients with newly diagnosed tuberculosis in United Kingdom, 1994-6

	All Isolates	Isoniazid resistant			Multidrug resistant
		No (%)	95% CI		No (%)	95% CI
All 1994-6	10 142	599 (5.9)	5.5 to 6.4		152 (1.5)	1.3 to 1.8
Year:
1994	3 253	181 (5.6)	4.8 to 6.4		43 (1.3)	1.0 to 1.8
1995	3 254	197 (6.1)	5.3 to 7.0		49 (1.5)	1.1 to 2.0
1996	3 635	221 (6.1)	5.3 to 6.9		60 (1.7)	1.3 to 2.1
Age (years):
0-14	185	8 (4.3)	2.2 to 8.6		2 (1.1)	0.3 to 4.3
15-44	4 792	389 (8.1)	7.3 to 9.0		95 (2.0)	1.6 to 2.4
45-64	2 224	119 (5.4)	4.5 to 6.4		33 (1.5)	1.1 to 2.1
⩾65	2 492	58 (2.3)	1.8 to 3.0		17 (0.7)	0.4 to 1.1
Unknown	449	25 (5.6)	3.8 to 8.2		5 (1.1)	0.5 to 2.7
Sex:
Male	5 780	361 (6.2)	5.6 to 6.9		105 (1.8)	1.5 to 2.2
Female	3 983	224 (5.6)	4.9 to 6.4		46 (1.2)	0.9 to 1.5
Sex unknown	379	14 (3.7)	2.2 to 6.2		1 (0.3)	0.0 to 1.9
History of tuberculosis:
Previous tuberculosis	568	107 (18.8)	14.8 to 21.6		64 (11.3)	8.4 to 13.7
No known previous tuberculosis	9 574	492 (5.1)	4.7 to 5.6		88 (0.9)	0.7 to 1.1
Country in which diagnosed:
England	8 731	546 (6.3)	5.8 to 6.8		140 (1.6)	1.4 to 1.9
Northern Ireland	170	6 (3.5)	1.6 to 7.9		1 (0.6)	0.1 to 4.2
Scotland	930	33 (3.5)	2.5 to 5.0		8 (0.9)	0.4 to 1.7
Wales	311	14 (4.5)	2.7 to 7.6		3 (1.0)	0.3 to 3.0
Place of diagnosis:
London	3 731	299 (8.0)	7.2 to 9.0		85 (2.3)	1.8 to 2.8
Outside London	6 411	300 (4.7)	4.2 to 5.2		67 (1.0)	0.8 to 1.3
HIV infection:
Positive	460	62 (13.5)	10.5 to 17.3		28 (6.1)	4.2 to 8.8
Negative or unknown	9 682	537 (5.5)	5.1 to 6.0		124 (1.3)	1.1 to 1.5