Table 3. Prevalence of HDV total antibodies by age group in 1276 pregnant women in the district of Tokombéré.

Variable	HDV Ab
	n positive/n tested (%)	RR (95% CI)*	P value
Age range (yr)
< 20	3/74 (4.1%)	1
20–23	4/60 (6.7%)	1.03 (0.95-1.12)	0.7‡
24–28	5/47 (10.6%)	1.07 (0.97-1.2)	0.26‡
> 28	7/76 (9.2%)	1.06 (0.97-1.15)	0.33‡
All	19/257 (7.4%)

* risk ratio and 95% confidence interval

^‡bilateral Fisher's exact test