TABLE 1.

Decision Tree Splits for NSSI Characteristics and Suicidal Thoughts and Behaviors

	Onset Split 1	Group 1 (N, M)	Group 2 (N, M)	Onset Split 2	Group 1 (N, M)	Group 2 (N, M)	Onset Split 3	Group 1 (N, M)	Group 2 (N, M)
Lifetime NSSI frequency	11	≤11 (155, 448.13)	>11 (802, 118.77)	–			–
Past-year NSSI frequency	10	≤10 (123, 32.87)	>10 (831, 18.09)	–			–
Number of NSSI methods	16	≤16	>16 (161, 1.30)	11	≤11 (155, 3.01)	>11	13	>11 & ≤13 (270, 2.37)	>13 & ≤16 (371, 2.11)
Number of hospital visits	10	≤10 (123, 0.30)	>10 (832, 0.09)	–			–
Suicidal ideation	–			–			–
Suicide plan	12	≤12 (264, 0.50)	>12 (693, 0.31)	–			–
Suicide attempt	–