Table 2.

Geometric mean titers (GMTs) of poliovirus-antibodies according to sex, age, and region

	PV1		PV2		PV3
	GMT	P value *	GMT	P value	GMT	P value
Total	163.1		206.2		108.4
	(134.9–191.2)		(174.2–238.1)		(85.3–131.5)
Sex
Male	173.1	0.51	257.1	0.004	112.3	0.76
	(-37.6–75.4)		(32.3–159.5)		(-39.0–53.7)
Female	154.2		161.2		105.0
	(-37.4–75.3)		(30.5–161.4)		(-38.9–53.6)
Age group (years)
6–10	372.8	<0.01	470.2	<0.01	280.8	<0.01
	(295.9–449.7)		(383.0–557.4)		(213.5–348.1)
11–20	83.0		107.1		38.2
	(59.4–106.7)		(81.9–132.2)		(27.6–48.9)
21–40	39.5		53.6		13.2
	(27.6–51.3)		(39.9–67.2)		(9.5–16.9)
41–60	34.0		63.5		23.9
	(22.0–45.9)		(47.6–79.4)		(16.2–31.7)
>60	142.6		113.2		38.9
	(31.0–254.2)		(20.2–206.3)		(19.8–58.1)
Region
Gyeonggi-do	172.0	0.16	205.7	<0.01	100.3	<0.01
	(119.1–224.9)		(153.8–257.7)		(66.4–134. 3)
Gyeongsang-do	176.0		248.2		128.1
	(119.8–232.3)		(166.3–330.2)		(67.4–188.9)
Seoul	109.6		100.1		40.0
	(39.9–79.2)		(59.4–140.7)		(19.5–60.5)
Chungcheong-do	218.0		273.6		185.5
	(127.6–308.4)		(165.5–381.8)		(95.1–275.9)
Jeolla-do	122.2		171.5		74.5
	(70.3–174.1)		(92.2–250.8)		(33.9–115.0)
Gangwon-do	149.3		263.7		135.0
	(71.1–227.5)		(87.0–440.3)		(33.7–236.3)
Jeju-do	86.0		173.0		136.0
	(-58.2–230.2)		(-117.4–463.4)		(-164.1–436.1)

The data are presented as mean (95% confidence interval).

^* P < 0.05 indicates significant differences of seroprevalence among the compared groups.

PV, poliovirus.