3. RESULTS
A total of 476 patients who met the inclusion criteria were included.
The median age of the patients was 39.0 (33.0-50.0) years. Of the
patients, 65.3% (n = 311) were male and 34.7% (n = 165) were female.
There were 391 (82.1%) patients with microscopic hematuria and 85
(17.9%) without microscopic hematuria. Approximately half (55.3%) of
the ureteral stones were localized in the distal part. The median stone
size was 4.1 mm (3.0-6.0 mm) in the presence of microscopic hematuria
and 5.5 mm (4.0-8.5 mm) in the absence of microscopic hematuria. A
statistically significant difference was observed between these two
groups in terms of stone size (p < 0.001) (Table 1). There was
also a statistically significant correlation between the degree of
hydronephrosis and the absence of microscopic hematuria (p = 0.042).
Microscopic hematuria was present in 84.1% (n = 292) of the patients
with normal and mild hydronephrosis and 76.7% (n = 99) of those with
moderate and severe hydronephrosis (Table 2). The relationship between
the size of the stone in the ureter and the severity of hydronephrosis
is shown in Table 2.
Univariate and multivariate logistic regression analyses were performed
to determine the relationship between hydronephrosis and possible
clinical variables. The multiple logistic regression analysis was
conducted between age, stone size, pyuria, and absence of microscopic
hematuria, which were determined to be statistically significant
variables in the univariate analysis (Table 3). According to the
results, stone size [odds ratio (OR): 2.15, 95% confidence interval
(CI): 1.12-4.16, p < 0.001), presence of pyuria (OR: 2.58,
95% CI: 1.78-3.48, p < 0.001), and absence of microscopic
hematuria (OR: 1.31, 95% CI: 1.04-2.89, p = 0.017) were correlated with
moderate and severe hydronephrosis.