Patients were categorized into mild (1st quartile), moderate (2nd and 3rd quartile), and severe group (4th quartile).
For the analysis, the number of types of disease vectors was categorized into quartiles (25th percentile = 1 vector; 50th percentile 2 vectors; 75th percentile ≥ 3 vector).
For the analysis, the number of item ownership was categorized into quartiles (25th percentile ≤ 3 items; 50th percentile 4 items; 75th percentile 5 6 items).
The channel simulators by Schulze and Höher can be categorized into the 12th class of frequency-selective SOC simulation models.
Other individual-level covariates included age, sex, educational attainment (categorized as ≤9 years, 10 11 years or ≥12 years of schooling), income (categorized into quartiles), and 1st or 2nd generation status.
Umbilical cord blood levels of leptin and adiponectin were categorized into the top 90th percentile and bottom 10th percentile.
The clusters were ranked on the basis of the continuous UADI scores and categorized into quintiles divided at the 20th, 40th, 60th, and 80th percentiles, such that class I was assigned to the 20% least disadvantaged urban areas and class V the 20% most disadvantaged urban areas.
For a dataset (D = {d_1, d_2, ldots, d_n}), it first sorts them chronologically in ascending order and then categorizes into four quarters called (Q_1) (1st quartile), (Q_2) (2nd quartile) and (Q_3) (3rd quartile).
The summary values were categorized into quartiles by cutoff points of 25th, 50th, and 75th values.
For each POP, subjects with serum concentrations < LOD were regarded as the reference group, and subjects with detectable values were categorized into quartiles by cutoff points of 25th, 50th, and 75th values.
a Measured in ml/kg/min, categorized into 3 groups (below the 25th percentile (low), between the 25th and the 75th percentiles (average), and above the 75th percentile (high) © Using backward stepwise procedure.
