Table 2.

Meta-regression of potential confounders: sample size, date of publication, period of data collection

Species	Cofactors	Coef	[95% confidence interval]		z	p value
P. malariae	Sample size	− 2.36E−06	− 7.24E−06	2.51E−06	− 0.95	0.342
	Date of publication	− 0.0021299	− 0.0051524	0.0008927	− 1.38	0.167
	Period of data collection	− 0.0131058	− 0.0266983	0.0004866	− 1.89	0.059
P. ovale spp.	Sample size	− 4.95E−07	− 1.44E−06	4.45E−07	− 1.03	0.302
	Date of publication	− 0.0003042	− 0.0015801	0.0009716	− 0.47	0.640
	Period of data collection	− 0.0025502	− 0.008897	0.0037966	− 0.79	0.431