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. Author manuscript; available in PMC: 2021 May 22.
Published in final edited form as: Vaccine. 2020 Apr 30;38(25):4079–4087. doi: 10.1016/j.vaccine.2020.04.031

Table 2:

Model Output and Interpretation

Variance Estimate
Random Effects
Participant ID (σ2) 1·39
Parameter Estimate Std. Error Exp of Parameter Estimate Interpretation of Exp
Fixed Effects
Intercept (α) −6·77 0·23 0·0012 No relevant interpretation16
Bed net (β1) −0·49 0·20 0·61 The rate ratio of malaria cases per unit time in the bed net group versus the no bed net group
Base vaccine, first 18 months (β2) −0·76 0·16 0·47 The rate ratio of malaria cases per unit time in the three- and four-dose vaccine groups versus the control group in the first 18 months
Second 18 months (β3) −0·26 0·12 0·77 The rate ratio of malaria cases per unit time in the second 18 months versus the first 18 months
Base vaccine, second 18 months (β4) −0·19 0·18 0·83 The rate ratio of malaria cases per unit time in the three-dose vaccine group versus the control group in the second 18 months
Fourth dose, second 18 months (β5) −0·56 0·20 0·57 The rate ratio of malaria cases per unit time in the four-dose vaccine group versus the control group in the second 18 months