To investigate the longitudinal outcomes of rehabilitation
(from baseline to 4 and 12 months) at a multidisciplinary rehabilitation
center. The three goals (“Reading,” “Writing,” and “Watching TV”) were measured with the Dutch ICF Activity Inventory
). In addition, outcomes were compared with the Low Vision
(LVQOL) for better insight into the (longitudinal) interpretation.
In a cohort of 241 visually impaired persons, corrected and uncorrected linear mixed models were used to determine longitudinal rehabilitation
outcomes for the D-AI
goals “Reading,” “Writing,” and “Watching TV,” and difficulty and underlying tasks, as well as for the LVQOL scales “Basic aspects” and “Reading and fine work.” At baseline, Spearman correlations were determined for similar scales of the D-AI
Importance scores of goals were stable over time. Difficulty scores decreased over time, but the differences were not significant at each measurement moment. For reading, difficulty of underlying tasks seemed to reflect the (change in) difficulty at the goal level; however, change in writing tasks did not reflect the change in the umbrella goal. Each of the three subscales of underlying tasks of the goal “Watching TV” changed in a different way. Changes in similar LVQOL scales were comparable, although less pronounced and more influenced by depression. Prescription or advice of low-vision aids and training in visual devices was not related (p > 0.01) with any of the outcome
It seems reasonable to conclude that the decrease in perceived difficulty was an effect of rehabilitation
. The D-AI
goal scores for difficulty were less influenced by depression and may be more sensitive to measure change over time compared with the LVQOL. Importance scores may not be useful for evaluation purposes.