"in quartile" is a correct and commonly used phrase in written English
It is used to refer to the division of a dataset into four equal parts, such as for ranking or measuring distributions. For example, "The survey results put Jack in the upper quartile of the group."
We hypothesized that in sports with RAEs, those born in quartile 4 will have more matches than their relatively older teammates.
In quartile analyses after adjustment for confounders (age, body mass index [BMI], alcohol consumption, and smoking), SHBG and E2 were positively associated with HDL, while FAI was negatively associated with HDL.
The difference between the two groups rises with the quartile of violence, and the largest difference is seen in quartile 4, providing evidence that the strongest effect is for municipalities with the most highways.
Higher year 7 CRP was also associated with both greater loss of FVC (455 mL in quartile 4 vs. 390 mL in quartile 1, P<0.001) and FEV1 (491 mL in quartile 4 vs. 442 mL in quartile 1, P = 0.001).
Mean plasma homocysteine and blood Pb levels in quartile 1 were found to be significantly higher than levels in quartile 4 of daily juice consumption (p value = 0.01 and p value <0.001, respectively).
Higher year 7 fibrinogen was associated with greater loss of forced vital capacity (FVC) between years 5 and 20 (439 mL in quartile 4 vs. 398 mL in quartile 1, P<0.001) and forced expiratory volume in 1 second (FEV1) (487 mL in quartile 4 vs. 446 mL in quartile 1, P<0.001) independent of cigarette smoking, body habitus, baseline lung function and demographic factors.
Table 3 shows the comparison of concentrations of plasma homocysteine, serum folate, plasma PLP, serum B12 and blood Pb in quartile 1 and quartile 4 on the basis of frequency of daily juice consumption.
No correlation was found in quartile 1.
The AUC was calculated as 0.712 in quartile I, 0.754 in quartile II, 0.829 in quartile III and 0.797 in quartile IV (Table 4).
The optimal cut-off value of Cysc for diagnosing AKI increased across FT4 quartiles (1.15 mg/L in quartile I, 1.15 mg/L in quartile II, 1.35 mg/L in quartile III and 1.45 mg/L in quartile IV).
The AUC for Cysc in detecting AKI in each quartile were as follows: 0.712 in quartile I, 0.754 in quartile II, 0.829 in quartile III and 0.797 in quartile IV.
