. Author manuscript; available in PMC: 2010 Sep 1.

Published in final edited form as: Addict Behav. 2009 May 3;34(9):723–729. doi: 10.1016/j.addbeh.2009.04.011

Table 1.

Characteristics of the sample by non-fatal overdose or suicide attempt history

	Neither behaviour (n=465)	Non-fatal overdose only (n=552)	OR¹ (95% CI)	Suicide attempt only (n=162)	OR¹ (95% CI)	Both behaviours (n=321)	OR¹ (95% CI)
Demographics
% Female	37	33	not significant	55	2.04 (1.42–2.93)^**	48	^* 1.54 (1.16–2.06)
Age (mean)	35.5 (SD 8.6)	37.7 (SD 8.5)	1.03 (1.02–1.05)^**	34.1 (SD 7.9)	not significant	36.7 (SD 8.5)	not significant
% Unemployed	83	82	not significant	81	not significant	84	not significant

Drug dependence
% Cannabis	49	54	not significant	65	1.97 (1.36–2.85)^**	62	1.72 (1.29–2.29)^**
% Sedative	26	35	1.57 (1.20–2.07)^**	36	1.67 (1.14–2.44)^*	52	3.19 (2.36–4.31)^**
% Psycho-stimulants (cocaine or stimulants)	53	64	1.56 (1.22–2.01)^**	64	1.58 (1.09–2.29)^*	78	3.05 (2.22–4.20)^**
% Alcohol	31	40	1.47 (1.13–1.91)^*	38	not significant	53	2.45 (1.83–3.29)^**

Psychopathology
% Depressive episode	52	50	not significant	77	3.06 (2.03–4.61)^**	78	3.22 (2.34–4.42)^**
% Anxiety disorder (PTSD or panic disorder)	39	43	not significant	69	3.44 (2.34–5.05)^**	64	2.83 (2.12–3.80)^**
% Screening for BPD	47	52	not significant	72	2.92 (1.98–4.31)^**	79	4.26 (3.08–5.88)^**
% High impulsivity	24	32	1.55 (1.15–2.09)^*	40	2.16 (1.44–3.24)^**	44	2.51 (1.81–3.48)^**
% Any childhood abuse (physical or sexual)	64	68	not significant	84	3.00 (1.90–4.76)^**	90	5.15 (3.41–7.75)^**
% Ever injected opioids	92	99	11.90 (4.18–33.33)^**	92	not significant	98	4.55 (1.89–10.87)^**

Reference group is ‘Neither behaviour’

p<0.05

^**

p<0.001