Application value of abdominal ultrasonography in the diagnosis of pediatric patients aged 3-12 years with acute appendicitis

Table 1 Comparative analysis of general data between the two pediatric patient groups

Indicators	AA group (n = 78)	Non-AA group (n = 24)	χ2/t	P value
Gender (male/female)	48/30	15/9	0.007	0.932
Age (years)	7.73 ± 2.45	7.42 ± 2.84	0.522	0.603
Time from disease onset to hospital admission (hour)	10.26 ± 3.88	9.67 ± 3.46	0.667	0.506
Single-parent family (no/yes)	63/15	19/5	1.961	0.161
Family medical history (without/with)	70/8	20/4	0.726	0.394

AA: Acute appendicitis.

Table 2 Analysis of detection results of abdominal ultrasonography

Abdominal ultrasonography	Gold standard		Total
	Positive	Negative
Positive	74	5	79
Negative	4	19	23
Total	78	24	102

Histopathological examination serves as the gold standard.

Table 3 Analysis of detection results of computed tomography examination

CT examination	Gold standard		Total
	Positive	Negative
Positive	70	6	76
Negative	8	18	26
Total	78	24	102

The gold standard is histopathological examination. CT: Computed tomography.

Table 4 Analysis of detection results of the combined detection

Combined detection	Gold standard		Total
	Positive	Negative
Positive	77	3	80
Negative	1	21	22
Total	78	24	102

Histopathological examination is the gold standard.

Table 5 Diagnostic efficacy of abdominal ultrasonography, computed tomography examination, and their combined detection for pediatric acute appendicitis

Inspection method	AUC	95%CI	Specificity (%)	Sensitivity (%)	P value
Abdominal ultrasonography	0.870	0.770-0.971	79.17	94.87	< 0.001
CT examination	0.824	0.714-0.933	75.00	89.74	< 0.001
Combined detection	0.931	0.852-1.011	87.50	98.72	< 0.001

CT: Computed tomography; AUC: Area under the curve; 95%CI: 95% confidence interval.

Table 6 Analysis of relevant parameters of abdominal ultrasonography, computed tomography, and their combined modalities (%)

Inspection method	Positive predictive value	Negative predictive value	Accuracy	Positive detection rate	Misdiagnosis rate
Abdominal ultrasonography	93.67	82.61	91.18	72.55	20.83
CT examination	92.11	69.23	86.27	68.63	25.00
Combined detection	96.25	95.45	96.08	75.49	12.50

CT: Computed tomography.