Table 1.

Hazard ratios (HR) (event:pupation) of An. gambiae larvae exposed to varying numbers of constrained P. flavescens nymphs

No. of nymphs	HR	95% CI	P-value	n	df
0	1	–	–	120	3
1	2.0	1.5–2.6	< 0.0001	120	1
2	1.4	1.1–1.8	0.02	120	1
4	1.1	0.8–1.4	0.50	120	1

Note: Significant P-values (Cox regression) are shown in bold

Abbreviations: n, sample size; df, degrees of freedom