Diagnostic Accuracy Rates of Appendicitis Scoring Systems for the Stratified Age Groups

Table 4

ROC curve analysis.

	AUC	value	PPV (%)	NPV (%)	Sensitivity (%)	Specificity (%)	Cut-off
18–45-years-old group
Karaman score	0.6285	0.08	092	19	61	63	9
Alvarado score	0.6646	0.01	91	29	83	47	6
Ripasa score	0.6536	0.02	92	19	57	68	11
Tzanakis score	0.6377	0.04	91	19	59	63	15
AIRS	0.5971	0.17	9	60	98	15	4
Eskelinen score	0.5534	0.47	89	22	80	37	61.22
Ohmann score	0.6222	0.06	93	17	43	79	16
Lintula score	0.6393	0.04	90	43	94	31	9
Fenyo-Lindberg score	0.6530	0.03	92	21	66	63	−9
46–65-years-old group
Karaman score	0.6250	0.52	100	8	31	100	12
Alvarado score	0.4688	0.93	96	12	78	50	6
Ripasa score	0.2969	0.01	100	8	25	100	11.5
Tzanakis score	0.3125	<0.01	94	0	100	0	6
AIRS	0.3594	0.50	100	6	9	100	10
Eskelinen score	0.2344	<0.01	94	0	100	0	39.68
Ohmann score	0.1563	<0.01	94	0	100	0	2
Lintula score	0.4844	0.93	100	7	19	100	23
Fenyo lindberg score	0.6875	0.40	100	10	47	100	−6
65+ years-old-group
Karaman score	0.4167	0.57	100	12	17	100	12
Alvarado score	0.4861	0.96	93	20	78	50	6
Ripasa score	0.5000	1.00	94	33	89	50	9.5
Tzanakis score	0.5278	0.90	92	14	67	50	12
AIRS	0.2778	0.43	90	0	100	0	5
Eskelinen score	0.6111	0.28	100	18	50	100	67.6
Ohmann score	0.5000	1.00	100	14	33	100	15
Lintula score	0.3611	0.68	92	14	67	50	17
Fenyo lindberg score	0.4861	0.94	100	13	28	100	−3

PPV: positive predictive value. NPV: negative predictive value. AUC: area under curve.