Table 3 Associations of age, number of reported sexual partners and frequency of sexual practices in the preceding month, with a diagnosis of urethral Chlamydia trachomatis and Neisseria gonorrhoeae.

	C trachomatis			N gonorrhoeae
	n (%)	OR (95% CI), p value	Adjusted OR (95% CI), p value*	n (%)	OR (95% CI), p value	Adjusted OR (95% CI), p value*
Age (years)
		p = 0.33	p = 0.09		p = 0.083	p = 0.053
18–29	9/165 (5.5)	1	1	16/165 (9.7)	1	1
30–39	12/303 (4.0)	0.71 (0.29 to 1.73)	0.66 (0.27 to 1.64)	22/303 (7.3)	0.73 (0.37 to 1.43)	0.73 (0.33 to 1.62)
40–80	5/131 (3.8)	0.69 (0.22 to 2.10)	0.59 (0.19 to 1.85)	5/131 (3.8)	0.37 (0.13 to 1.04)	0.37 (0.11 to 1.21)
Number of sexual partners in the previous month
		p = 0.74	p = 0.74		p = 0.19	p = 0.29
0–1	7/206 (2.4)	1	1	11/206 (5.3)	1	1
2–5	15/238 (6.3)	1.91 (0.76 to 4.79)	1.69 (0.64 to 4.44)	19/238 (8.0)	1.54 (0.71 to 3.31)	1.44 (0.58 to 3.58)
>5	4/121 (3.3)	0.97 (0.28 to 3.39)	1.17 (0.31 to 4.45)	10/121 (8.3)	1.60 (0.66 to 3.88)	1.71 (0.62 to 4.79)
Number of sexual practices in the previous month
Unprotected receptive oral intercourse
		p = 0.46	p = 0.61		p = 0.03	p = 0.058
0–2	6/148 (4.1)	1	1	3/148 (2.0)	1	1
3–9	16/184 (8.7)	2.25 (0.86 to 5.91)	1.90 (0.69 to 5.23)	15/184 (8.2)	4.29 (1.22 to 15.1)	3.02 (0.82 to 11.1)
>9	4/187 (2.1)	0.52 (0.14 to 1.87)	0.42 (0.10 to 1.71)	16/187 (8.6)	4.52 (1.29 to 15.8)	2.84 (0.75 to 10.8)
Unprotected insertive anal intercourse
		p = 0.57	p = 0.24		p = 0.001	p = 0.24
0	18/419 (4.3)	1	1	18/419 (4.3)	1	1
1–4	6/95 (6.3)	1.50 (0.58 to 3.89)	1.70 (0.64 to 4.55)	15/95 (15.8)	4.18 (2.02 to 8.63)	3.53 (1.60 to 7.83)
>4	2/47 (4.3)	0.99 (0.22 to 4.41)	1.68 (0.34 to 8.34)	4/47 (8.5)	2.07 (0.67 to 6.40)	1.78 (0.54 to 5.88)

*Adjusted OR is adjusted for all other risk factors in this column.