Table 1. Chlamydia trachomatis (CT), lymphogranuloma venereum (LGV) and non-LGV chlamydia positivity in urethral and rectal specimens from MSM by clinic.

Clinic*	Urethral chlamydia				Rectal chlamydia
	% (95% CI)				% (95% CI)
	No of tests	All CT	LGV	Non-LGV CT	No of tests	All CT	LGV	Non-LGV CT
A	3501	3.26 (2.67 to 3.85)	0.06 (0.01 to 0.14)	3.20 (2.62 to 3.78)	3501	7.21 (6.34 to 8.06)	1.09 (0.75 to 1.43)	6.11 (5.32 to 6.90)
B	933	3.43 (2.26 to 4.60)		3.43 (2.26 to 4.60)	1210	5.87 (4.55 to 7.19)	0.58 (0.15 to 1.01)	5.29 (4.03 to 6.55)
C	.		.	.	1672	7.18 (5.94 to 8.42)	0.60 (0.23 to 0.97)	6.58 (5.39 to 7.77)
D	391	2.81 (1.17 to 4.45)		2.81 (1.17 to 4.45)	395	7.34 (4.77 to 9.91)	1.52 (0.31 to 2.73)	5.82 (3.51 to 8.13)
All	4825	3.25 (2.78 to 3.80)	0.04 (0.01 to 0.16)	3.21 (2.74 to 3.76)	6778	6.96 (6.37 to 7.60)	0.90 (0.69 to 1.16)	6.06 (5.51 to 6.66)

*A, Brighton; B, Mortimer Market; C, Royal Free; D, St Thomas’s.