Prevalence, risk factors, and medical costs of Chlamydia trachomatis infections in Shandong Province, China: a population-based, cross-sectional study

Table 1 The weighted prevalence of CT and NG in participants 18–49 years of age in Shandong, China

	Male [n, %(95%CI)]		Female [n, %(95%CI)]		Denominator^a (unweighted, weighted^b)
	CT	NG	CT	NG	Male	Female
Age(years)
18–24	11, 4.3% (0.0–8.8)	0, 0.0%	7, 3.2% (0.4–6.1)	1, 0.2% (0.0–0.6)	253, 851	194, 825
25–29	18, 2.3% (0.5–4.1)	0, 0.0%	24, 2.9% (1.9–3.8)	0, 0.0%	780, 496	914, 499
30–34	13, 2.8% (1.3–4.2)	0, 0.0%	20, 3.5% (2.6–4.4)	1, 0.1% (0.0–0.2)	500, 469	555, 461
35–39	13, 2.7% (1.1–4.2)	0, 0.0%	8, 1.4% (0.4–2.4)	1, 0.1% (0.0–0.3)	557, 567	588, 559
40–44	15, 2.4% (1.3–3.5)	0, 0.0%	14, 1.5% (0.4–2.6)	1, 0.1% (0.0–0.4)	713, 667	735, 659
45–49	7, 0.8% (0.2–1.3)	1, 0.2% (0.0–0.5)	17, 1.6% (0.9–2.4)	1, 0.1% (0.0–0.3)	692, 572	722, 578
Region
Northwest	4, 3.0% (0.0–7.7)	0, 0.0%	7, 1.6% (0.6–2.5)	0, 0.0%	338, 390	348, 356
Middle	28, 3.0% (1.1–4.9)	0, 0.0%	17, 2.0% (0.0–4.6)	0, 0.0%	895, 941	907, 851
South	29, 2.7% (1.7–3.8)	1, 0.1% (0.0–0.2)	46, 3.0% (2.2–3.9)	2, 0.1% (0.0–0.5)	1489, 1456	1567, 1479
East	16, 2.0% (1.3–2.7)	0, 0.0%	20, 1.8% (1.1–2.5)	3, 0.2% (0.0–0.5)	773, 835	886, 895
Total	77, 2.7% (1.6–3.8)	1, 0.03% (0.0–0.1)	90, 2.3% (1.5–3.2)	5, 0.1% (0.0–0.3)	3495, 3622	3708, 3581

Abbreviations: CI confidence interval, CT chlamydia trachomatis, NG neisseria gonorrhoeae
^aDenominator was participants with sex experience and a urine test result
^bSelection probability weighting, non-response weighting, and post-stratification weighting were applied to calculate the weighted denominator

ISSN: 1471-2334