Physical multimorbidity and lifetime suicidal ideation and plans among rural older adults: the mediating role of psychological distress

Table 3 The mediating role of psychological distress on the association between physical multimorbidity and suicidal ideation among the older adults (60+) in rural areas of Shandong province, China, 2019

Characteristics	Suicidal ideation
	Without mediators (Model 1)			With mediators (Model 2)
	OR	P-value	95%CI	OR	P-value	95%CI
Multimorbidity (chronic conditions)
None	1.0			1.0
One	1.51	0.020	1.07–2.14	1.34	0.106	0.94–1.93
Two	1.94	< 0.001	1.35–2.77	1.53	0.026	1.05–2.23
Three	2.78	< 0.001	1.82–4.25	2.29	< 0.001	1.46–3.59
Four and above	4.08	< 0.001	2.04–8.19	3.29	0.002	1.55–6.99
Psychological distress (level)
Low				1.0
Moderate				2.48	< 0.001	1.73–3.56
High				4.98	< 0.001	3.55–7.00
Very high				13.70	< 0.001	9.37–20.02
Sex
Male	1.0			1.0
Female	1.62	0.010	1.12–2.33	1.47	0.048	1.00–2.15
Age (Years)	0.98	0.037	0.96–1.00	0.98	0.078	0.96–1.00
Educational attainment
Illiterate	1.0			1.0
Primary school	0.96	0.774	0.74–1.25	0.92	0.551	0.69–1.21
Middle school or above	0.96	0.816	0.67–1.36	0.91	0.630	0.63–1.32
Marital status
Single	1.0			1.0
Married	1.20	0.232	0.89–1.61	1.16	0.338	0.85–1.59
Household income
Q1 (the poorest)	1.0			1.0
Q2	0.77	0.127	0.56–1.08	0.83	0.296	0.59–1.18
Q3	0.72	0.060	0.52–1.01	0.80	0.224	0.56–1.14
Q4 (the richest)	0.64	0.012	0.45–0.91	0.76	0.153	0.53–1.10
Cigarette smoking
Never smoker	1.0			1.0
Current smoker	0.79	0.249	0.54–1.17	0.64	0.037	0.42–0.97
Former smoker	0.84	0.277	0.50–1.39	0.81	0.441	0.47–1.38
Alcohol drinking
Never-drinker	1.0			1.0
Former drinker	1.29	0.392	0.72–2.31	1.54	0.164	0.84–2.85
Current drinker	0.97	0.888	0.65–1.45	1.16	0.479	0.76–1.78
Physical exercise
No	1.0			1.0
Yes	0.62	< 0.001	0.48–0.79	0.61	< 0.001	0.47–0.78
Sleep disturbances
No	1.0			1.0
Yes	2.28	< 0.001	1.77–2.94	1.28	0.081	0.97–1.69

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