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Discover Ludwig"quartile 1" is a correct and usable phrase in written English
It is typically used in statistics or data analysis to refer to the first quarter or 25% of a data set. Example: The average income in the lowest quartile 1 was $20,000, while the highest quartile 4 had an average income of $80,000.
Exact(55)
Among all participants no statistically significant difference in WBCs were observed when comparing DII quartile 4 (most pro-inflammatory) to quartile 1 (most anti-inflammatory).
In both groups, quartile 1 included SAT-Math scores of 0 480 and quartile 4 included scores of 590 800.
As can be seen in Fig. 1, in all sports, quartile 1 was overrepresented in comparison to the other quartiles.
Average homicide rates are higher for the municipalities with highways than municipalities with no highways in all cases, except quartile 1.
Death from all causes was entered in the model as a competing risk Q1, quartile 1; eGFR, ml/min/1.73 ml/min/1.73
Boxplot interpretation: 0 or +: average value, −: median, rectangle bottom: quartile 1 cutpoint (25th percentile), rectangle upper: quartile 3 cutpoint (75th percentile).
Similar(5)
All results were presented as a median value (quartile 1∼ quartile 3) because the SALL4 expression in leukemia showed a skewed distribution.
The number of reported comorbidities was dichotomised at the upper quartile (≤1 vs ≥2).
The number of CVD diseases was dichotomised at the upper quartile (≤1 vs ≥2).
Median concentration [quartile 1 - quartile 3] values of tamoxifen and metabolites are given as ng/ml.
Diabetes diagnosis was 6 years later in CFRD patients, 14.5 years (quartile 1 quartile 3: 11.8 16.3) compared with T1DM, 8.5 years (quartile 1 quartile 3: 4.9 11.8) (P < 0.001).
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com