Table 4 Associations of age, number of reported sexual partners and frequency of sexual practices in the preceding month with a diagnosis of rectal 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 = 0.60	p = 0.65		p = 0.001	p = 0.002
18–29	8/165 (4.9)	1	1	19/165 (11.5)	1	1
30–39	24/303 (7.9)	1.69 (0.74 to 3.85)	1.64 (0.66 to 4.06)	22/303 (7.3)	0.60 (0.32 to 1.15)	0.57 (0.27 to 1.19)
40–80	7/131 (5.3)	1.11 (0.39 to 3.14)	1.28 (0.42 to 3.88)	3/131 (2.3)	0.18 (0.05 to 0.62)	0.18 (0.05 to 0.64)
Number of sexual partners in the previous month:
		p = 0.41	p = 0.87		p = 0.06	p = 0.27
0–1	12/206 (5.8)	1	1	9/206 (4.4)	1	1
2–5	14/238 (5.9)	1.01 (0.46 to 2.24)	1.27 (0.52 to 3.07)	17/238 (7.1)	1.68 (0.73 to 3.86)	1.63 (0.66 to 4.02)
>5	11/121 (9.1)	1.62 (0.69 to 3.79)	1.57 (0.59 to 4.16)	15/121 (12.4)	3.10 (1.31 to 7.32)	3.37 (1.27 to 8.94)
Number of sexual practices in the previous month:
Unprotected receptive anal intercourse
		p = 0.003	p = 0.03		p = 0.002	p = 0.12
0	20/420 (4.8)	1	1	21/420 (5.0)	1	1
1–4	12/97 (12.4)	2.82 (1.33 to 6.00)	2.71 (1.24 to 5.94)	14/97 (14.4)	3.20 (1.57 to 6.56)	2.67 (1.27 to 5.63)
>4	4/43 (9.3)	2.05 (0.67 to 6.30)	1.87 (0.56 to 6.19)	5/43 (11.6)	2.50 (0.89 to 7.01)	1.88 (0.56 to 6.28)
Unprotected receptive oro‐anal intercourse
		p = 0.03	p = 0.26		p = 0.02	p = 0.65
0	8/237 (3.4)	1	1	8/237 (3.4)	1	1
1–4	18/210 (8.6)	2.68 (1.14 to 6.31)	2.28 (0.90 to 5.76)	21/210 (10.0)	3.18 (1.38 to 7.34)	2.21 (0.92 to 5.27)
>4	10/109 (9.2)	2.89 (1.11 to 7.54)	2.40 (0.81 to 7.11)	9/109 (8.3)	2.58 (0.97 to 6.87)	1.42 (0.48 to 4.19)

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