Table 3. Age factor for co-infection of NG and CT and their 95% CI of person with NG who also had CT and person with CT who also had NG.

Variable	Age (y)	Co-infection	NG co-infected with CT (%)	p-value	All CT infection (%)	p-value
Male	<25	61	4.76 (3.59–5.93)	Ref.	1,049 (4.40–7.24)	Ref.
	25–55	168	4.43 (3.78–5.08)	0.62	5,090 (2.81–3.79)	<0.0001
	>55	4	3.05 (0.10–6.00)	0.37	201 (0.06–3.92)	0.03
	All	233	4.47 (3.91–5.03)		6,340 (3.22–4.14)
	Probability (p-value)		0.642
Female	<25	118	22.56 (18.98–26.14)	Ref.	3,914 (2.47–3.55)	Ref.
	25–55	145	12.79 (10.85–14.73)	<0.0001	10,436 (1.17–1.61)	<0.0001
	>55	2	3.70 (−1.34–8.74)	0.001	244 (−0.31–1.95)	0.05
	All	265	15.49 (13.78–17.20)		14,594 (1.60–2.04)
	Probability (p-value)		0.001

Values are presented as number only or odds ratio (95% CI).

NG: Neisseria gonorrhoeae, CT: Chlamydia trachomatis, CI: confidence interval, Ref.: reference.