To summarize these frequencies, we categorized the level of prenatal care per trimester according to the quartile distribution of the number of visits (see Methods and Additional file 1 for details).
We categorized the level of comorbidity by using the Charlson Comorbidity Index (CCI) [ 19], an extensively studied and validated instrument used to predict risk of death from comorbid diseases [ 19, 20].
To compare these results according to seropositivity of H. Pylori, we categorized the level of total cholesterol (TC) as normal (≤240 mg/dl) and abnormal (>240 mg/dl), trigryceride (TG) as ≤150 mg/dl and >150 mg/dl, and fasting glucose as ≤100 mg/dl and >100 mg/dl, respectively.
They have shown that, because of seasonal variations in 25-hydroxyvitamin D, choosing season-specific cut-offs to categorize the levels of this biomarker was a more efficient approach than adjusting for the date of sampling in a regression model where cancer occurrence was the dependent variable.
The Sara Lee Corporation in Chicago, seeking to stimulate growth after disappointing results, is categorizing the level of advertising and marketing support that its brands should receive.
A logarithmic lifetime diagram associated with the common time units was used for presenting the ageing data, which regardless of the spread in the lifetimes allowed categorizing the level of the stability of P3HT PCBM based devices tested under different ageing conditions.
The goal of this study was to use a short screening tool, the FRAIL scale, to categorize the level of frailty of older adults admitted with a fracture to determine the association of each frailty category with postoperative and 30-day outcomes.
A Preliminary Risk Analysis (PRA) seems to be an interesting way to categorize the level of alarms.
After categorizing the level of proteinuria, a graded relationship between amount of proteinuria and adjusted level of FGF23 was revealed.
A simple, hierarchical grading system has been used in this paper to categorize the level of evidence supporting recommendations in the JE surveillance standards (Table 2).
