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Table 2 Estimated correlation coefficients and their 95% confidence intervals in the random intercepts and random slopes, from the primary analysis and three sensitivity analyses using bivariate linear mixed models

From: Estimating correlation between multivariate longitudinal data in the presence of heterogeneity

Models Correlations between random intercepts Correlations between random slopes
Primary analyses: without adjusting heterogeneity 0.278 (0.121, 0.420) 0.579 (0.349, 0.810)
Sensitivity #1: adjusting the severity of vision damage at diagnosis (MD < −5 dB vs. MD ≥ −5 dB) 0.267 (0.090, 0.452) 0.519 (0.285, 0.753)
Sensitivity #2: excluding those who labelled as “Rapid Progression”. 0.217 (0.077, 0.354) 0.289 (0.010, 0.593)
Sensitivity #3: estimating class-specific intercepts and slopes 0.145 (−0.037, 0.324) 0.106 (−0.255, 0.490)