Prevalence and correlates of suicide attempts in high-risk populations: a cross-sectional study among patients receiving opioid agonist therapy in Norway

Table 3 Negative binomial regression of the association between suicide attempts and their risk factors (N = 595)

	Number of patients¹⁾	IRR (95 % CI)
	Number of patients¹⁾	Suicide attempt
Sex
Male	163	1.0 (ref.)
Female	81	1.2 (0.9–1.6)
Level of education
- Not completed primary school	15	1.0 (ref.)
- Completed primary school (9 years)	109	0.8 (0.4–1.5)
- Completed high school (12 years)	98	0.8 (0.4–1.5)
- ≤ 3 years of college or university	19	1.0 (0.5–2.1)
- > 3 years of college or university	< 5	0.6 (0.2–2.1)
Early onset of substance use²⁾⁺³⁾	137	1.7 (1.3–2.2)

IRR Incidence rate ratio, CI Confidence interval
1) Number of patients who attemped suicide (ever) (244 patients), stratified on sex, level of education, and early onset of substance use
2) The early onset of substance use is defined as substance use before the age of 13 (< 13).
3) As a robustness check, the assocation between the early onset of substance use [binary exposure variables (yes/no)] and suicide attempts (ever) [binary outcome variables (yes/no)] was assessed using a logistic regression analysis. The result showed OR 1.7, 95 % CI: 1.2 - 2.3
Legends: The table displays the association between the level of education, sex, early onset of substance use, and suicide attempts among patients who received opioid agonist therapy

ISSN: 1471-244X