BMC Musculoskeletal Disorders

Table 2 Sociodemographic Characteristics of Study Population after Propensity Score Matching

From: The relationship between spinal pain and temporomandibular joint disorders in Korea: a nationwide propensity score-matched study

	TMD		Non-TMD
	Patients (N)	(%)	Patients (N)	(%)	Standardized differences
Total	12,375		12,375
Sex
Male	4792	38.7^a	4792	38.7^a
Female	7583	61.3	7583	61.3	0.000
Age
20–29	3958	32.0	3958	32.0
30–39	2386	19.3	2386	19.3
40–49	2027	16.4	2027	16.4
50–59	1879	15.2	1879	15.2
60–69	1155	9.3	1155	9.3
70 or older	970	7.8	970	7.8	0.000
Insurance type
NHI	12,073	97.6	12,073	97.6
others^b	302	2.4	302	2.4	0.000
Region
Seoul	3116	25.2	3116	25.2
Capital area	2712	21.9	2712	21.9
Metropolitan	3323	26.9	3323	26.9
Rural areas	3224	26.1	3224	26.1	0.000
CCI
0	5598	45.2	5598	45.2
1–2	4023	32.5	4023	32.5
3–4	1971	15.9	1971	15.9
5 or more	783	6.3	783	6.3	0.000

^aDenominator: total patients by each group, applies to all % below
^bOthers: beneficiaries, veterans
TMD Temporomandibular Disorder, NHI National Health Insurance, CCI Charlson Comorbidity Index

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ISSN: 1471-2474

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