Risk factors of concurrent urinary sepsis in patients with diabetes mellitus comorbid with upper urinary tract calculi

Table 1 Analysis of clinical data

Factors		Occurrence group (n = 78)	Nonoccurrence group (n = 126)	χ2 value	P value
Gender				9.219	0.002
	Male	30	76
	Female	48	50
Age				5.732	0.016
	≥ 60 yr	45	51
	< 60 yr	33	75
BMI				0.292	0.588
	≥ 25 kg/m2	28	50
	< 25 kg/m2	50	76
History of lumbago and abdominal pain				8.459	0.003
	Yes	38	36
	No	40	90
Hematuria				0.569	0.450
	Yes	36	65
	No	42	61
Symptoms of urinary tract irritation				4.036	0.044
	Yes	60	80
	No	18	46
Hypertension				0.533	0.465
	Yes	30	55
	No	48	71
Operation time		64.32 ± 15.35	59.94 ± 7.04	4.662	0.001

BMI: Body mass index.

Table 2 Detection of urinary indexes

Factors		Occurrence group (n = 78)	Nonoccurrence group (n = 126)	χ2	P value
Urine occult blood				1.210	0.750
	-	18	35
	1+	22	28
	2+	24	38
	3+	14	25
U-LEU				15.330	0.002
	-	4	30
	1+	26	38
	2+	20	37
	3+	28	25
U-NIT				12.499	0.001
	-	33	85
	+	45	41
U-GLU				11.596	0.008
	-	7	33
	1+	17	31
	2+	40	50
	3+	14	12

U-LEU: Urinary leukocytes; U-NIT: Urinary nitrite; U-GLU: Urinary glucose.

Table 3 Comparison of imaging indexes

Factors		Occurrence group (n = 78)	Nonoccurrence group (n = 126)	χ2	P value
Lateral classification of calculi				1.494	0.221
	Left	48	88
	Right	30	38
Obstruction position				2.938	0.086
	Ureter	64	90
	Kidney	14	36
Maximum diameter of calculi				0.048	0.825
	≥ 20 mm	39	65
	< 20 mm	39	61
Degree of hydronephrosis				0.400	0.526
	Yes	11	22
	No	67	104

Table 4 meaningful indicators were assigned

Factors	Assignment
Gender	Male = 0, female = 1
Age	≥ 60 yr = 1, < 60 yr = 0
History of lumbago and abdominal pain	Yes = 1, no = 0
Symptoms of urinary tract irritation	Yes = 1, no = 0
Operation time	≥ 60 yr = 1, < 60 yr = 0
U-LEU	- = 0, 1 + -3 + = 1
U-NIT	- = 0, + = 1
U-GLU	- = 0, 1 + -3 + = 1
Occurrence	Occurrence group = 1, nonoccurrence group = 0

U-LEU: Urinary leukocytes; U-NIT: Urinary nitrite; U-GLU: Urinary glucose.

Table 5 Logistic multivariate regression

Factors	β	Standard error	χ2	P value	OR	95%CI
						Lower limit	Upper limit
Gender	0.794	0.335	5.603	0.018	2.212	1.146	4.268
Age	0.941	0.346	7.408	0.006	2.563	1.301	5.047
History of lumbago and abdominal pain	0.901	0.348	6.700	0.010	2.462	1.245	4.871
Symptoms of urinary tract irritation	0.628	0.379	2.753	0.097	1.875	0.892	3.939
Operation time	-1.071	0.345	9.619	0.002	0.342	0.174	0.674
U-LEU	1.972	0.602	10.725	0.001	7.182	2.207	23.373
U-NIT	0.491	0.339	2.101	0.147	1.634	0.841	3.172
U-GLU	1.541	0.509	9.171	0.002	4.668	1.722	12.652

U-LEU: Urinary leukocytes; U-NIT: Urinary nitrite; U-GLU: Urinary glucose.