Fig. 4
From: Geostatistical modelling of the association between malaria and child growth in Africa
Estimated trajectories of height-for-age Z-scores (HAZ) as a function of age, stratified by malaria incidence (\(\mathcal {M}\)). Each panel shows three curves. Each curve is a piecewise cubic spline with knots at 12 and 24 months and corresponds to a tercile group of \(\mathcal {M}\). The solid, dotted and dashed curves respectively correspond to the first, second and third terciles of \(\mathcal {M}\), as indicated in Fig. 2. The horizontal lines are the HAZ levels of 0 and − 2