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It is this doctor's practice to check for porphyria after a "negative" exploratory surgery for severe abdominal pain.
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This model enables us to explore the association between social metabolism (HANPP), landscape structure (composition and spatial configuration) and biodiversity (species richness) by using Negative Binomial Regression (NBR), Exploratory Factor Analysis (EFA) and Structural Equation Modelling (SEM).
Efecto de constraste negativo y conducta explorativa (Negative contrast effect and exploratory behavior).
In order to prevent false negative findings in this exploratory study, we decided not to correct the significance level for multiple comparison.
The rationale for this choice is to minimize the chances of false negatives because of the exploratory nature of these secondary endpoint analyses.
However, in the subgroup of nodal-negative cases (n=26) an exploratory multivariate survival analysis with inclusion of grade and cytoplasmic RelA positivity showed RelA overexpression as a significant prognosticator (relative risk=3.49, P=0.020).
Due to the severe effect of multiple comparison adjustments on false negative error rates and the exploratory nature of this research, such adjustments have been avoided to prevent this.
Two of 5 patients with pancreatic cancer, and 1 of 3 patients with cholangiocarcinoma, with underwent exploratory surgery had margin-negative resections.
Exploratory tests for metastasis were negative.
In an exploratory analysis, we evaluated the expected negative correlation between ejection fraction and strain (r = −0.40 in low preload, −0.31 in intermediate preload, and −0.60 in high preload).
The exploratory meta-regression analyses reveal a negative relationship between effect size estimate and study risk of bias.
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