. Author manuscript; available in PMC: 2014 Aug 15.

Published in final edited form as: J Med Entomol. 2014 Jul;51(4):885–890. doi: 10.1603/me14008

Table 2.

Correlations between dengue case numbers in the Mérida City study neighborhoods and data for weather conditions, abundance of Ae. aegypti females, or surveillance for dengue virus (DENV) in Ae. aegypti females in the same or subsequent months.

Lag time	Correlation with numbers of dengue cases in the study neighborhoods in the same or subsequent months based on the monthly data presented in Table 1 ^a
	Total monthly rainfall (mm)				Monthly average daily temperature (ºC)				Geometric mean no. Ae. aegypti females per home				Percentage of examined Ae. aegypti females infected with DENV				Percentage of examined homes with DENV-infected Ae. aegypti females collected

	Type^b	N	ρ	P	Type^b	N	ρ	P	Type^b	N	ρ	P	Type^b	N	ρ	P	Type^b	N	ρ	P
+ 0 mo	NA	24	0.272	0.198	NA	24	−0.137	0.525	Pos	15	0.666	0.007	NA	15	−0.178	0.525	NA	15	−0.199	0.477
+ 1 mo	Pos	23	0.476	0.022	NA	23	0.268	0.215	Pos	15	0.756	0.001	NA	15	−0.506	0.054	NA	15	−0.402	0.138
+ 2 mo	Pos	22	0.553	0.008	Pos	22	0.646	0.001	NA	15	0.512	0.051	Neg	15	−0.641	0.010	Neg	15	−0.557	0.031
+ 3 mo	NA	21	0.364	0.105	Pos	21	0.844	<0.001	NA	15	0.112	0.691	NA	15	−0.386	0.156	NA	15	−0.255	0.359
+ 4 mo	NA	20	0.017	0.944	Pos	20	0.750	<0.001	NA	15	−0.170	0.545	NA	15	−0.291	0.292	NA	15	−0.258	0.354
+ 5 mo	NA	19	−0.280	0.245	Pos	19	0.508	0.027	NA	15	−0.400	0.140	NA	15	−0.184	0.511	NA	15	−0.077	0.785

Based on Spearman’s rank correlation (ρ) along with the number of data points (N) and the p-value for the test of significance (P).

Pos – Positive correlation (P<0.05); Neg – Negative correlation (P<0.05); NA – non-significant correlation (P≥0.05).