. 2007 Feb;85(2):138–145. doi: 10.2471/BLT.06.029389

Table 5. Antigenaemia prevalences in two age groups in villages that received mass drug administration alone or combined with vector control, Tirukoilur, India.

Treatment in villages	Age group	1999–2002	2003–04
Treatment in villages	Age group	% positive (number tested)	% positive (number tested)
Mass drug administration (MDA) alone	2–5	7.2^a (333)	4.5^a (200)
MDA with vector control	2–5	3.4^a (366)	2.0^b (200)
MDA alone	15–25	20.4^c (334)	19.5^c (200)
MDA with vector control	15–25	17.7^d (361)	5.5^e (200)

^a,b,c,d,e Data sharing the same superscript letter do not differ statistically significantly (based on χ² test).