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Table 8 Set of aspects that produced the best recall for P and I

From: Combination of conditional random field with a rule based method in the extraction of PICO elements

Aspect Best choice of aspect Other assessed choices
Gaussian prior 10 0.1, 1, 10, 100
Model training-proportion (100, 0%) (50, 50%), (80, 20%), (90, 10%)
Training information layout Standard Information redundancy
Testing information layout Redundant information Standard
Mixing different features All features Part of them
Type of feature values Categorical Binary, natural
Grouping structural features Yes No