Table 2.

Prevalence of GBS colonization in different age groups

Age Groups (Years)	PCR		Culture
	n (Postive/Total)	Prevalence Rate (95% CI)	n (Postive/Total)	Prevalence Rate (95% CI)
≤24	148/1982	7.5 (6.3–8.6)	54/1710	3.2 (2.3–4.0)
25–29	377/3991	9.4 (8.5–10.4)	124/3398	3.6 (3.0–4.3)
30–34	189/2193	8.6 (7.4–9.8)	49/1527	3.2 (2.3–4.1)
35–39	64/730	8.8 (6.7–10.8)	15/429	3.5 (1.8–5.2)
≥40	11/126	8.7 (3.7–13.7)	7/98	7.1 (2.0–12.3)
P	0.161		0.28

CI confidence interval

Compare the age groups with the highest and lowest prevalence rate by PCR, P = 0.011

Compare the age groups with the highest and lowest prevalence rate by Culture, P = 0.034