Table 1.

Efficacy of 4 repellent formulations tested 4 and 5 hours after application during Study A in Guatemala

		Hours post application
Treatment		4	5	Mean	95 % C.I.
Filler mix control	AM	115.52	100.48	108.00	55.13 – 96.39
	WM	79.83	66.64	72.74a
	% P	--	--	--
C15	AM	1.28	5.04	3.16	0.46 – 01.38
	WM	0.64	1.40	0.96b
	% P	98.89	94.98	97.07
T15	AM	1.36	1.44	1.40	00.43 – 01.17
	WM	0.79	0.72	0.76b
	% P	98.82	98.57	98.70
T20	AM	0.84	1.84	1.34	0.28 – 00.97
	WM	0.43	0.77	0.59b
	% P	99.27	98.17	98.76
15 % DEET	AM	6.08	11.72	8.90	2.68 – 06.38
	WM	3.63	4.87	4.21c
	% P	94.74	88.34	91.76

AM = arithmetic mean mosquito landings per person hour.

WM = William's mean mosquito landings per person hour. Means followed by different letters are significantly different.

% P = Percentage protection i.e. 100 - ((mosquito landings on treatment ÷ mosquito landings on control) × 100).