Predictive modeling and machine learning show poor performance of clinical, morphological, and hemodynamic parameters for small intracranial aneurysm rupture.

Obesity exhibited a weak trend on the training and validation set ( p = 0.095, pseudo-R 2 = 0.024), but its performance on the test set dropped to a pseudo-R 2 of − 0.047, confirming that obesity is not a reliable predictor of SIA rupture.

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