Evaluation of the spatial linear model, random forest and gradient nearest-neighbour methods for imputing potential productivity and biomass of the Pacific Northwest forests

H. Temesgen; J. M. Ver Hoef

doi:10.1093/forestry/cpu036

Evaluation of the spatial linear model, random forest and gradient nearest-neighbour methods for imputing potential productivity and biomass of the Pacific Northwest forests

Forestry An International Journal of Forest Research ◽

10.1093/forestry/cpu036 ◽

2014 ◽

Vol 88 (1) ◽

pp. 131-142 ◽

Cited By ~ 11

Author(s):

H. Temesgen ◽

J. M. Ver Hoef

Keyword(s):

Random Forest ◽

Linear Model ◽

Pacific Northwest ◽

Nearest Neighbour ◽

Potential Productivity ◽

The Pacific ◽

Spatial Linear Model

Download Full-text

Value of machine learning to predict functional outcome of endovascular treatment for acute ischaemic stroke of the posterior circulation

The Neuroradiology Journal ◽

10.1177/19714009211049088 ◽

2021 ◽

pp. 197140092110490

Author(s):

Ludger Feyen ◽

Peter Schott ◽

Hendrik Ochmann ◽

Marcus Katoh ◽

Patrick Haage ◽

...

Keyword(s):

Machine Learning ◽

Random Forest ◽

Ischaemic Stroke ◽

Endovascular Treatment ◽

Linear Model ◽

Acute Ischaemic Stroke ◽

Favourable Outcome ◽

Posterior Circulation ◽

Nearest Neighbour ◽

Modified Rankin Scale

Purpose Clinical outcomes vary considerably among individuals with vessel occlusion of the posterior circulation. In the present study we evaluated machine learning algorithms in their ability to discriminate between favourable and unfavourable outcomes in patients with endovascular treatment of acute ischaemic stroke of the posterior circulation. Methods This retrospective study evaluated three algorithms (generalised linear model, K-nearest neighbour and random forest) to predict functional outcomes at dismissal of 30 patients with acute occlusion of the basilar artery who were treated with thrombectomy. Input variables encompassed baseline as well as peri and postprocedural data. Favourable outcome was defined as a modified Rankin scale score of 0–2 and unfavourable outcome was defined as a modified Rankin scale score of 3–6. The performance of the algorithms was assessed with the area under the receiver operating curve and with confusion matrixes. Results Successful reperfusion was achieved in 83%, with 30% of the patients having a favourable outcome. The area under the curve was 0.93 for the random forest model, 0.86 for the K-nearest neighbour model and 0.78 for the generalised linear model. The accuracy was 0.69 for the generalised linear model and 0.84 for the random forest and the K nearest neighbour models. Conclusion Favourable and unfavourable outcomes at dismissal of patients with acute ischaemic stroke of the posterior circulation can be predicted immediately after the follow-up non-enhanced computed tomography using machine learning.

Download Full-text