Fig. 4From: Broad external validation of a multivariable risk prediction model for gastrointestinal malignancy in iron deficiency anaemiaDecision curve analysis for GI investigation using the combined external datasets. Grey line: penalised IDIOM model. Black line: ‘investigate no-one’ strategy. Dashed line: ‘investigate all’ strategy. The vertical axis displays standardised net benefit. The horizontal axis shows the risk thresholdsBack to article page