Temporal variation in confirmed diagnosis of fever-related malarial cases among children under-5 years by community health workers and in health facilities between years 2013 and 2015 in Siaya County, Kenya

Table 4 Negative binomial regression univariable analyses (P ≤ 0.1) for cases diagnosed by community health workers

Variable	Variable category	Coefficient	95% confidence interval	P > \|z\|	Likelihood ratio test P*	α	Likelihood-ratio test of α = 0
Village	Marenyo	0.52	[0.30, 0.74]	0.000	0.000	0.21	0.000^╩
	Nyawara	0.06	[− 0.17, 0.28]	0.608
	Nyandiwa	− 0.21	[− 0.44, 0.01]	0.064
	Gongo	0.26	[0.04, 0.49]	0.021
	Ramula	0.83	[0.61, 1.06]	0.000
	Nyamninia	0.01	[− 0.21, 0.24]	0.896
	Jina	− 0.13	[− 0.36, 0.08]	0.234
	Uranga	0.32	[0.10, 0.54]	0.005
	Lihanda	0.23	[0.01, 0.46]	0.040
Year	2014	0.52	[0.39, 0.64]	0.000	0.000	0.22	0.000
Year	2015	0.73	[0.61, 0.86]	0.000
Month	February	0.15	[− 0.13, 0.42]	0.301	0.001	0.28	0.000
	March	0.35	[0.07, 0.63]	0.012
	April	0.26	[− 0.01, 0.54]	0.063
	May	0.45	[0.18, 0.73]	0.001
	June	0.45	[0.18, 0.73]	0.001
	July	0.59	[0.31, 0.87]	0.000
	August	0.34	[0.06, 0.62]	0.015
	September	0.18	[− 0.09, 0.46]	0.193
	October	0.12	[− 0.15, 0.40]	0.374
	November	0.15	[− 0.12, 0.43]	0.284
	December	0.24	[− 0.03, 0.52]	0.088
Rainfall	Current	0.00042	[− 0.0006, 0.0015]	0.436	0.436	0.30	0.000
	1 month lag	− 0.0004	[− 0.0006, 0.0015]	0.410	0.411	0.30	0.000
	2 month lag	0.00014	[− 0.002, 0.002]	0.896	0.896
	2 month cumulative	− 0.00001	[− 0.0006, 0.0006]	0.964	0.964	0.30	0.000
	3 month cumulative	0.00006	[− 0.0004, 0.0006]	0.825	0.825	0.30	0.000
	4 month cumulative	− 0.00005	[− 0.0005, 0.0004]	0.847	0.847	0.30	0.000

* P used to test the statistical significance (P ≤ 0.1) of the contribution of the variable to the univariable model; ^╩ P used to test the statistical significance of α (the overdispersion parameter). When the statistical significance of α is significant (P ≤ 0.05), it suggests that the variance in the data is higher than would be expected for a Poisson regression

ISSN: 1475-2875