Very sloppy statistics. A lot of explanatory analysis on the model is done but the model is hardly justified in being predictive in the first place.
The paper (https://journals.plos.org/plosone/article?id=10.1371/journal...) [does not mention the sensitivity or specificity of the model at all, only mentions a '91% accuracy' number]* on a biased dataset (where the number of suicidal cases is oversampled and non-suicidal cases are undersampled), without even mentioning exactly how much they over/undersampled.
* I missed the ROC curve on page 7. However it's not clear if this ROC curve was computed on the under/oversampled dataset or the original.
The paper (https://journals.plos.org/plosone/article?id=10.1371/journal...) [does not mention the sensitivity or specificity of the model at all, only mentions a '91% accuracy' number]* on a biased dataset (where the number of suicidal cases is oversampled and non-suicidal cases are undersampled), without even mentioning exactly how much they over/undersampled.
* I missed the ROC curve on page 7. However it's not clear if this ROC curve was computed on the under/oversampled dataset or the original.