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Figure 1 | Health and Quality of Life Outcomes

Figure 1

From: Comparison of three longitudinal analysis models for the health-related quality of life in oncology: a simulation study

Figure 1

Power of the test of interaction between treatment arm and time for complete datasets (CD), datasets with intermittent missing forms and monotone missing data (IMF), and datasets with intermittent missing items and monotone missing data (IMI). The methods compared are the Score and Mixed Model (SM), longitudinal Partial Credit Model (LPCM), Time to HRQoL score deterioration as compared to the baseline score (TTD baseline) or the best previous score (TTD best) and time until definitive deterioration of the HRQoL score as compared to the baseline score (TUDD baseline) or the best previous score (TUDD best) for different values of sample size (N), items (I), correlations between HRQoL measure (ρ) and the proportion of missing data, which was fixed at π = 0.20.

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