Fig. 3From: When a joint model should be preferred over a linear mixed model for analysis of longitudinal health-related quality of life data in cancer clinical trialsRepresentation of the hazard functions considered in the simulation study for both arms where the current HRQoL true value is set to its theoretical mean, i.e., \(\lambda \left(t| arm,\mathbb{E}\left(\left({Y}^{\star}\Big(t\right)\right)\right)={\lambda}_0(t)\exp \left\{{\gamma}_1\ arm+\alpha\ \left({\beta}_0+{\beta}_1t+{\beta}_2\left\{ arm\times t\right\}\right)\right\}\) where λ0(t) = ϕtϕ − 1 exp(γ0) with ϕ and exp(γ0) the shape and scale parameters, respectively, according to t with t the time in months and arm the treatment arm indicator. HRQoL, health-related quality of lifeBack to article page