A Comparative Study of the Epidemiology of Treponemal Infection in the Volta and Oti Regions of Ghana: A Five-Year Multisite Parallel Population-Based Analysis vis-à-vis the Sentinel Survey

Table 1

Year-on-year prevalence of treponemal infection among blood donors and pregnant women (sentinel survey) in the Volta Region.

Parameter	Total	2013	2014	2015	2016	2017	for trends
Sentinel	7817	1292	1525	1720	1605	1675
Positive	62 (0.79)	16 (1.24)	22 (1.44)	9 (0.52)	2 (0.12)	13 (0.78)	0.0025
All donors	17744	2753	3195	3336	4421	4039
Positive	423 (2.38)	78 (2.83)	75 (2.35)	93 (2.79)	144 (3.26)	33 (0.82)	0.0001
Donors (within the sentinel age group)	16858	2550	3036	3160	4250	3862
Positive	389 (2.31)	69 (2.71)	70 (2.31)	86 (2.72)	131 (3.08)	33 (0.85)	0.0002
	<0.0001	<0.0025	0.0525	<0.0001	<0.0001	0.9960
	<0.0001	<0.0050	0.0651	<0.0001	<0.0001	0.8935

Data are presented as the frequency with the corresponding percentage in parenthesis. compares all donors within the sentinel, and compares donor within 15-49 years with the sentinel. is significant at 0.05.