Table 5.

Cross-validation results estimating predictive accuracy of tree models at a new site

Site	Which youth with SIB at home are likely to have SIB at the Hospital (Fig. 2)			Which youth are likely to have SIB at home and/or hospital? (Fig. 3)
	Accuracy	True positive rate	True negative rate	Accuracy	True positive rate	True negative rate
1	59.18	14.79	86.67	71.01	93.88	15
2	51.52	6.25	94.12	91.43	93.94	50
3	54.55	50	56.25	73.33	90.91	25
4	54.76	30	77.27	83.02	97.62	27.27
5	65.38	0	79.07	71.43	94.23	24
6	76.92	40	85.71	68.42	84.62	33.33
Site mean	60.38	23.67	79.85	76.44	92.53	29.10