Suicidal ideation and the risk of suicide in patients with fibromyalgia: a comparison with non-pain controls and patients suffering from low-back pain

Figures & data

Table 1 Sociodemographic data of the participants

	N	Control (N=50)	FM (N=44)	LBP (N=32)	P-value
Age (mean ± standard deviation; years)	115	50.5±7.5	54.5±12.7	50.1±8.2	0.1844
Sex (female/male)	95/31	36/14	41/3	18/14	0.0009
Marital status	94
Single/divorced/widowed		29	8	7	0.3773
Married/de facto		6	17	27
Educational status	105
No school/primary school		6	17	26	<0.0001
Secondary school/university		33	8	15
Employment status	108
Work only at home		2	4	10	<0.0001
Work outside home		37	12	4
Sick leave		0	2	15
Unemployed		0	4	5
Retired		4	4	5

Abbreviations: FM, fibromyalgia; LBP, low-back pain.

Table 2 Differences between groups in total depression and sleep quality scores, mean pain intensity and severity, and physical and mental health components

	Control vs FM	Control vs LBP	FM vs LBP	P-value (global comparison)
BPI intensity	−67.41##	−53.75##	−13.65ns	<0.0001
BPI interference	−67.07##	−44.02##	−23.04*	<0.0001
BDI	−65.91##	−30.18#	−35.73##	<0.0001
PSQI	−53.41##	−29.46#	−23.94*	<0.0001
SF-12 PCS	−59.85##	−44.45##	−15.39ns	<0.0001
SF-12 MCS	−41.97##	−16.46ns	−25.51**	<0.0001

Notes:

* P<0.05;

** P<0.01;

# P<0.001;

## P<0.0001;

ns not significant.

Abbreviations: BDI, Beck’s Depression Inventory; BPI, Brief Pain Inventory; FM, fibromyalgia; LBP, low-back pain; MCS, mental component summary; PCS, physical component summary; PSQI, Pittsburgh Sleep Quality Index; SF-12, Short-Form Health Survey SF-12; vs, versus.

Figure 1 Suicidal ideation and risk of suicide in the studied groups.

Table 3 ORs for suicidal ideation and for risk of suicide in both patient groups as compared with controls

	OR	95% CI	P-value
Suicidal ideation
Fibromyalgia	26.889	5.72–126.42	<0.0001
Low-back pain	4.583	0.826–25.432	0.082
Risk of suicide
Fibromyalgia	48.000	12.929–178.206	<0.0001
Low-back pain	4.725	1.297–17.209	0.019

Abbreviations: CI, confidence interval; OR, odds ratio.