Table 3.

Comparison of treatments for mortality to drop below 80% and 50% for laboratory, simple hut, and experimental hut bioassays

Substrate	Treatment comparison	Difference in estimated time to 80% mortality			Difference in estimated time to 50% mortality
		Time (months)	95% CI	P-value	Time (months)	95% CI	P-value
Laboratory Bioassays
Mud	SC-PE 50 vs SC-PE 25	5.0	(4.0 to 6.2)	<0.05	4.2	(3.0 to 5.6)	<0.05
	SC-PE 50 vs WG	5.3	(4.4 to 6.3)	<0.05	4.9	(4.0 to 6.2)	<0.05
	SC-PE 50 vs DDT	8.2	(7.2 to 9.4)	<0.05	7.4	(6.4 to 8.7)	<0.05
	SC-PE 25 vs WG	0.2	(-0.8 to 1.2)	n/s	0.7	(-0.1 to 1.6)	n/s
	SC-PE 25 vs DDT	3.2	(2.1 to 4.3)	<0.05	3.2	(2.3 to 4.3)	<0.05
	WG vs DDT	2.9	(2.0 to 3.9)	<0.05	2.5	(1.7 to 3.2)	<0.05
Concrete	SC-PE 25 vs WG	0.6	(-1.5 to 2.5)	n/s	†	†	†
	SC-PE 25 vs DDT	5.4	(3.8 to 7.3)	<0.05	†	†	†
	WG vs DDT	4.8	(3.0 to 6.8)	<0.05	†	†	†
Simple Hut Bioassays
Mud	SC-PE 50 vs SC-PE 25	†	†	†	−1.4	(0.4 to -3.7)	n/s
	SC-PE 50 vs WG	†	†	†	2.0	(-0.5 to 4.5)	n/s
	SC-PE 25 vs WG	†	†	†	3.4	(1.6 to 5.9)	<0.05
Concrete	SC-PE 50 vs SC-PE 25	3.2	(1.8 to 4.7)	<0.05	2.3	(0.5 to 4.0)	<0.05
	SC-PE 50 vs WG	†	†	†	12.6	(10.6 to 15.1)	<0.05
	SC-PE 25 vs WG	†	†	†	10.3	(8.3 to 13.0)	<0.05
Experimental Hut Bioassays
Mud	SC-PE 25 vs WG	†	†	†	7.5	(4.4 to 13.8)	<0.05
	SC-PE 25 vs DDT	†	†	†	4.7	(2.6 to 7.2)	<0.05
	WG vs DDT	†	†	†	−2.8	(-9.9 to 0.5)	n/s
Concrete	SC-PE 25 vs WG	5.7	(1.9 to 11.6)	<0.05	†	†	†
	SC-PE 25 vs DDT	4.4	(1.3 to 9.5)	<0.05	†	†	†
	WG vs DDT	−1.2	(-5.9 to 2.4)	n/s	†	†	†

Notes : † indicates that statistical models produced estimates outside the study period.