Table 4.

Goodness of fit of covariance models by cross-validation.

Covariance model	Median SSPE
	Murewa	Shamva	Mutasa
Children 6–59 months
	n = 208	n = 223	n = 201
Exponential	0.431	0.455	0.323
Spherical	0.432	0.439	0.342
Women of reproductive age
	n = 258	n = 260	n = 239
Exponential	0.416	0.381	0.309
Spherical	0.406	0.376	0.295

The confidence interval for the median SSPE for the children biomarker (all districts) is (0.31, 0.60) and for WRA it is (0.32, 0.59).