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Fig. 3 | BMC Medical Research Methodology

Fig. 3

From: Flexible modelling of risk factors on the incidence of pneumonia in young children in South Africa using piece-wise exponential additive mixed modelling

Fig. 3

Time-varying hazard ratios over time \(HR(t)={\text {exp}\ {\left (\widehat {\beta }_{1}+{\hat {f}}_{1}(t)\right)} \ \ }\)for a HIV exposed and uninfected children versus HIV unexposed children, and b children with low weight-for-length Z-score at birth versus children who don’t have low weight-for-length Z-score at birth all with 95% confidence intervals (shaded area)

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