Table 4. Median (interquartile range) adjusted antenatal syphilis prevalence for the six WHO world regions.

Statistical comparisons are Kruskal-Wallis tests comparing adjusted median ASP in each region with that in sub-Saharan Africa.

Region	n	1990–1999	n	2000–2009
Sub-Saharan Africa	33	3.01 (1.39–4.42)	35	1.48 (0.72–2.60)
Europe	14	0.09 (0.09–0.13)***	11	0.08 (0.04–0.70)***
East Mediterranean	10	0.38 (0.16–0.95)***	7	0.04 (0.00–0.71)**
Americas	12	0.59 (0.09–2.48)*	21	0.54 (0.35–0.93)*
South/South East Asia	6	1.25 (0.66–1.68)	7	0.40 (0.02–1.47)
Western Pacific	12	0.42 (0.20–1.35)**	9	0.21 (0.10–1.53)

*P<0.05,

** P<0.005,

*** P<0.0005