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It has been shown that influenza (487) codes tend to have high specificity but low sensitivity for identifying influenza cases [16], [17], so we analysed the data using two definitions of influenza, one with only influenza-specific ICD-9 codes (487) and another with influenza and pneumonia ICD-9 codes (486 and 487).
Data was analyzed using two definitions of positive reactor: 1) an animal was considered BTB positive if the reaction at the bovine site minus the reaction at the avium site was greater than 4 mm (official OIE definition), 2) an animal was considered positive if the bovine site minus the reaction at the avium site was greater than 2 mm [20], [21].
We excluded urban counties using two definitions of urban.
The findings were internally consistent, using two definitions of CAC progression in linear and logistic regression analyses.
A supplemental responder analysis using two definitions of response patients with ≥50% and with ≥30% reductions in mean pain scores from baseline was also performed.
In a parallel analysis, the impact of the restriction to patients with severe osteoporosis was also studied using two definitions of severity: the WHO criteria (a T-score of −2.5 or less and a prior fragility fracture) and the probability-based assessment of fracture risk (FRAX®).
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Using three definitions of at risk groups, we examine the cartographic representation of HIV late testers in Texas and show that the resulting spatial patterns and the interpretation of disease burdens are different based on the choice of the at-risk population.
Based on previous research, we analyzed the data using three definitions of a liberal transfusion trigger in patients who underwent red blood cell transfusion: a liberal intraoperative Hb trigger as a nadir Hb level of 10 g/dL or greater, a liberal postoperative Hb trigger as a nadir Hb level of 8 g/dL or greater, or a whole hospital nadir Hb level of 8-10 g/dL.
To assess the association of a "metabolically healthy obese" phenotype with mortality using five definitions of metabolic health.
This study, a secondary analysis of SPA conducted in five sub-Saharan African countries, systematically compared estimates of medicine availability using five definitions of availability (four of current availability and one six-month availability).
We use two definitions of the 'typical' education for a New Zealand-born individual employed in each occupation; the first definition uses the modal qualification, which we only use for descriptive tables, while the second calculates the mean years of education.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com