Table 1.

BAC+ and BAC− by different demographic, psychosocial and suicide-related characteristics

	BAC+		BAC−
	N	%	N	%	Crude OR (95% CI)	Adjusteda OR (95% CI)
Sex
Male	1727	79.2	3418	74.9	1.28 (1.13–1.45)***	1.29 (1.14–1.46)***
Female	453	20.8	1146	25.1	1 (RC)	1 (RC)
Age groups
Below 25 years	309	14.2	674	14.8	0.72 (0.62–0.84)***	0.73 (0.62–0.85)***
25–44 years	1084	49.7	1702	37.3	1 (RC)	1 (RC)
45–64 years	664	30.5	1384	30.3	0.75 (0.67–0.85)***	0.76 (0.68–0.86)***
65 years and older	123	5.6	804	17.6	0.24 (0.20–0.30)***	0.24 (0.20–0.29)***
Suicide methods
Poisoning by drugs/medicine	269	12.3	865	19.0	0.52 (0.48–0.57)***	0.63 (0.53–0.74)***
Poisoning by other means	240	11.0	420	9.2	0.97 (0.89–1.06)	1.07 (0.90–1.28)
Hanging or suffocation	1309	60.0	2215	48.5	1 (RC)	1 (RC)
Firearms or explosives	134	6.1	373	8.2	0.61 (0.54–0.68)*	0.78 (0.63–0.97)*
Other methods	228	10.5	691	15.1	0.56 (0.51–0.61)***	0.61 (0.52–0.72)***
Ethnicity
Aboriginal and Torres Strait Islander	229	10.5	185	4.1	2.83 (2.32–3.47)***	2.72 (2.21–3.36)***
Unknown ethnicity	305	14.0	610	13.4	1.15 (0.99–1.33)	1.14 (0.98–1.32)
Other Australian	1646	75.5	3769	82.6	1 (RC)	1 (RC)
Marital status
Single/never married	533	35.1	1654	36.2	0.99 (0.87–1.14)	0.81 (0.70–0.94)**
Married/de facto	765	24.4	1161	25.4	1 (RC)	1 (RC)
Separated	376	17.2	545	11.9	1.49 (1.28–1.75)***	1.37 (1.17–1.61)***
Divorced	152	7.0	287	6.3	1.15 (0.92–1.42)	1.28 (1.03–1.60)*
Widowed	32	1.5	194	4.3	0.36 (0.24–0.52)***	0.76 (0.51–1.14)
Unknown	322	14.8	723	15.8	0.96 (0.82–1.13)	0.90 (0.76–1.05)
Psychiatric disorders
A diagnosed psychiatric disorder	979	44.9	2437	46.6	0.71 (0.64–0.79)***	0.74 (0.66–0.82)***
Unipolar depression	753	34.6	1768	38.7	0.84 (0.75–0.93)**	0.89 (0.80–1.00)*
Bipolar disorder	84	3.9	239	5.2	0.73 (0.56–0.94)*	0.75 (0.58–0.96)*
Anxiety disorders	143	6.6	390	8.5	0.75 (0.62–0.92)**	0.78(0.64–0.96)*
Psychotic disorders	63	2.9	358	7.8	0.35 (0.27–0.46)***	0.33 (0.25–0.43)***
Substance use disorders	207	9.5	255	5.6	1.18 (1.47–2.15)***	1.75 (1.45–2.12)***
Any other psychiatric disorder	122	5.6	349	92.4	0.72 (0.58–0.89)**	0.69 (0.56–0.86)**
An untreated mental health problems	791	36.3	1376	30.1	1.32 (1.19–1.47)***	1.25 (1.12–1.39)***
Lifetime suicide attempt	691	31.7	1409	30.9	1.04 (0.93–1.16)	1.02 (0.91–1.14)
Lifetime suicidal ideation	1052	48.3	1979	43.4	1.22 (1.10–1.35)***	1.20 (1.08–1.33)***
A physical condition	828	38.0	2312	49.3	0.60 (0.54–0.66)***	0.70 (0.63–0.78)***
Life events
Relationship conflict	465	21.3	536	11.7	2.04 (1.78–2.34)***	1.90 (1.66–2.18)***
Relationship separation	643	29.5	1054	23.1	1.39 (1.24–1.56)***	1.29 (1.15–1.45)***
Bereavement	271	12.4	539	11.8	1.06 (0.91–1.24)	1.12 (0.95–1.31)
Familial conflict	219	10.0	397	8.7	1.17 (0.99–1.39)	1.12 (0.94–1.34)
Interpersonal conflict	160	7.3	182	4.0	1.91 (1.53–2.37)***	1.77 (1.42–2.20)***
Pending legal matters	224	10.3	376	8.2	1.28 (1.07–1.52)**	1.17 (0.98–1.39)
Financial problems	337	15.5	640	14.0	1.12 (0.97–1.29)	1.11 (0.96–1.29)
Recent/pending unemployment	223	10.2	372	8.2	1.29 (1.08–1.53)**	1.23 (1.03–1.47)*
Work/school problems (not financial)	142	6.5	338	7.4	0.87 (0.71–1.07)	0.81 (0.66–1.00)*
Child custody dispute	127	5.8	172	3.8	1.58 (1.25–2.00)***	1.47 (1.16–1.86)**
Childhood trauma	57	2.6	145	3.2	0.82 (0.60–1.12)	0.77 (0.56–1.05)
Sexual abuse	59	2.7	90	2.0	1.38 (0.99–1.93)	1.37 (0.98–1.92)

RC, reference category.

Boldface indicates statistical significance (*p < 0.05; **p < 0.01; ***p < 0.001).

^aAdjusted for sex and age (only for age by sex and for sex by age).