Clinical data collection and statistical analysis
hydronephrosis
HYDRONEPHROSIS, PCT
We estimated that a total of 150 patients would be needed to compare a difference between groups, with a two-tailed α of 0.05 and a (1 − β) of 0.90. Our initial estimate of same size included an assumption non-compliance of 20%.Patients’ clinical data were collected including WBCs, neutrophils, serum C-reactive protein (CRP), PCT, urine leukocytes, urine culture, serum creatinine, stone size, stone density, hydronephrosis grade, symptom duration, nature of drainage fluid, length of hospital stay (days) and time for body temperature to return to normal (days). A Student’s 