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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: J Consult Clin Psychol. 2015 Jan 26;83(2):253–264. doi: 10.1037/a0038657

Table 1.

Characteristics of Samples for Examination of Developmental Trends and for Tests of the Sensitization Hypotheses

Purpose of Sample Participants Length of Follow-Up Assessments Number of Attempts
Developmental Trends n = 109 (45 males, 64 females) with at least one attempt M = 14 years, 0 months (SD = 3 years, 10 months); range: 0 year, 6 months - 17 years, 6 months) 1511 (M = 13.2, SD = 4.9; range: 2 - 26) 286 (M = 2.6, SD = 2.5; range: 1 - 15)
Intent and Lethality n = 41 (17 males, 24 female) with at least two attempts during the time immediately prior to hospitalization or over the follow-up M = 14 years, 10 months (SD = 2 years, 10 months; range: 1 year, 9 months - 17 years, 6 months) 713 (M = 13.0, SD = 4.6; range: 3 - 26) 147 (M = 3.6, SD = 2.7; range: 1-13)
Time Between Successive Attempts n = 63 (23 males, 40 females) who made at least two attempts at any time in their lives M = 14 years, 1 month (SD = 3 years, 10 months; range: 0 years, 6 months - 17 years, 6 months) 986 (M = 13.8, SD = 4.9; range: 2 - 26) 240 (M = 3.8, SD = 2.7; range: 2 - 15)
Life Events and Suicide Attempts n = 36 (16 males, 20 females) who made at least two attempts over the follow-up M = 15 years, 2 months (SD = 2 years, 0 month; range: 8 years, 0 month - 17 years, 6 months) 686 (M = 14.6, SD = 4.5; range: 4 - 26) 129 (M = 3.6, SD = 2.7; range: 2 - 12)