Assessment of Lumbar Spinal Stenosis as a Risk Factor for Development of Sleep Disorder: The Locomotive Syndrome and Health Outcome in Aizu Cohort Study (LOHAS)

Figures & data

Table 1 Characteristics of the Study Participants

	(-) LSS^a	(+) LSS	P value
	n = 328	n = 161
	Mean [SD], n (%)
Age (years)	70.5[3.6]	71.6[4.2]	< 0.001
Female Sex	196(59.8)	104(64.6)	0.30
Obesity	116(36.6)	71(46.1)	< 0.05
Hypertension	203(64.0)	110(71.4)	0.11
Diabetes Mellitus	29(9.5)	19(13.6)	0.20
Depressive symptoms	94(28.7)	65(40.4)	< 0.01
Smoking habit (current)	30(9.4)	14(9.3)	0.96
Sleep disorder onset in 2010	16(4.9)	22(13.7)	< 0.001

Abbreviation: ^aLSS, Lumbar spinal stenosis.

Figure 1 Flowchart of the study population. Of the 2254 study participants in the LOHAS 2008, 489 (21.7%) were included in the present study for statistical analysis.

Abbreviation: LSS, Lumbar spinal stenosis.

Table 2 Comparison of Characteristics Between the Two Groups After Propensity Score Matching

	(-) LSS^a	(+) LSS	P value
	n = 133	n = 133
	Mean [SD], n (%)
Age (years)	71.3[3.5]	71.4[4.2]	0.79
Female Sex	83(62.4)	82(61.7)	0.90
Obesity	55(41.4)	61(45.9)	0.55
Hypertension	102(76.7)	95(71.4)	0.96
Diabetes Mellitus	18(13.5)	15(11.3)	0.58
Depressive symptoms	49(36.8)	48(36.1)	0.90
Smoking habit (current)	15(11.3)	13(9.8)	0.69
Sleep disorder onset in 2010	6(4.5)	19(14.3)	< 0.01

Abbreviation: ^aLSS, Lumbar spinal stenosis.

Figure 2 Relationship between presence of LSS in 2008 and occurrence of sleep disorder in 2010. *P = 0.0063.

Abbreviation: LSS, Lumbar spinal stenosis.