TABLE I.

CHARACTERISTICS OF STUDY PARTICIPANTS IN HO CHI MINH CITY AND HANOI, VIETNAM (1997)

	HO CHI MINH CITY (N=1,106) (%)*	HANOI (N=1,170) (%)*	p for Difference†
Age (years, median, range)	41 (16–69)	43 (17–82)	>0.05
<25	16.7	13.1
25–34	18.7	19.2
35–44	19.9	19.5
45–54	18.1	18.0
55–64	17.5	19.2
≥65	9.1	11.0
Education			<0.0001
None	9.0	20.6
Grade 1–5	31.2	34.4
Grade 6 or higher	59.8	45.0
Marital status			> 0.05
Currently married	80.9	82.6
Divorced	6.5	4.3
Widowed	12.6	13.1
Age at first intercourse (years)			<0.001
<19	21.1	34.8
19–20	25.5	34.6
≥21†	53.4	30.5
Age at first pregnancy (years)			<0.001
<21	36.6	45.3
21–24	32.2	40.3
≥25	31.2	14.4
Lifetime number of sexual partners > 1	6.4	5.4	>0.05
HPV DNA detected	9.0	1.7	<0.001

^*Denominators for percentages exclude observations with missing values;

^†Two-sided.