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This work proposes a technique for decision support in identifying subjects who will show transition from mild cognitive impairment (MCI) to Alzheimer\u2019s disease (AD) in the future. We used robust predictors from multivariate MRI\u2010derived biomarkers and neuropsychological measures and tracked their longitudinal trajectories to predict signs of AD in the MCI population. Assuming piecewise linear progression of the disease, we designed a novel weighted gradient offset\u2010based technique to forecast the future marker value using readings from at least two previous follow\u2010up visits. Later, the complete predictor trajectories are used as features for a standard support vector machine classifier to identify MCI\u2010to\u2010AD progressors amongst the MCI patients enrolled in the Alzheimer\u2019s disease neuroimaging initiative (ADNI) cohort. We explored the performance of both unimodal and multimodal models in a 5\u2010fold cross\u2010validation setup. The proposed technique resulted in a high classification AUC of 91.2% and 95.7% for 6\u2010month\u2010 and 1\u2010year\u2010ahead AD prediction, respectively, using multimodal markers. 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