Table 4.

Test Characteristics of AS, mAS, PAS, mPAS

AS	Score	Sensitivity	Specificity	PPV	NPV	Accuracy	mAS	Score	Sensitivity	Specificity	PPV	NPV	Accuracy
	1	100.0	1.6	30.9	100.0	31.1		1	100.0	1.6	30.9	100	31.1
	2	100.0	4.0	31.4	100.0	32.8		2	98.2	5.6	31.4	87.5	33.3
	3	98.2	11.9	32.9	93.8	37.8		3	90.7	17.5	33.1	84.6	3.94
	4	94.5	25.4	35.6	91.2	46.1		4	83.3	36.5	36.5	83.3	50.6
	5	85.2	43.7	39.8	87.1	56.1		5	59.3	64.3	40.8	76.9	62.8
	6	81.5	62.7	48.4	88.5	68.3		6	31.5	85.7	47.1	73.3	69.4
	7	68.5	74.6	54.9	85.3	72.8		7	7.4	98.4	71.4	71.1	71.1
	8	51.9	84.1	55.1	78.6	74.4
	9	25.9	92.1	58.3	73.7	72.2
	10	5.6	99.2	80.0	70.9	71.1
PAS	1	100.0	1.6	30.9	100.0	31.1	mPAS	1	100.0	2.4	31.1	100.0	31.1
	2	100.0	4.8	31.6	100.0	33.3		2	98.2	5.6	31.4	87.5	33.3
	3	98.2	12.7	33.5	94.7	38.3		3	94.5	17.5	34.0	88.9	40.6
	4	90.8	23.0	34.7	86.1	43.3		4	87.0	30.2	36.1	85.1	47.2
	5	90.8	38.9	39.7	90.7	54.4		5	77.8	50.8	41.2	82.1	58.9
	6	81.5	56.4	44.4	86.4	63.9		6	64.8	68.3	46.7	81.0	67.2
	7	68.5	72.2	50.7	83.2	71.1		7	29.6	84.9	44.1	72.6	68.3
	8	55.6	85.7	61.7	80.4	76.7		8	9.3	96.0	50.0	70.6	70.0
	9	25.9	92.1	56.0	73.6	72.2
	10	7.4	96.8	50.0	70.4	70.0

AS Alvarado Score, mAS modified Alvarado Score, PAS Pediatric Appendicitis Score, mPAS modified Pediatric Appendicitis Score, NPV Negative Predictive Value, PPV Positive Predictive Value

Cut-off values with their respective test characterstics have been highlighted for each of the appendicitis scores assessed