Asian ethnicity: a risk factor for adhesive capsulitis?

Malavolta, Eduardo Angeli; Gracitelli, Mauro Emilio Conforto; Pinto, Gustavo de Mello Ribeiro; Silveira, Arthur Zorzi Freire da; Assunção, Jorge Henrique; Ferreira Neto, Arnaldo Amado

doi:10.1016/j.rboe.2018.02.004

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Sumário

Artigos Originais • Rev. bras. ortop. 53 (5) • Sep-Oct 2018 • https://doi.org/10.1016/j.rboe.2018.02.004 copy

Asian ethnicity: a risk factor for adhesive capsulitis?^☆ ☆ Study conducted at Grupo de Ombro e Cotovelo, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Objective:

The aim of this study was to evaluate whether Asian ethnicity is a risk factor for the development of adhesive capsulitis. The secondary aim was to describe the distribution of cases of capsulitis by age group.

Methods:

A cross-sectional study comparing the rate of adhesive capsulitis in individuals of Asian ethnicity with that of other ethnicities. We excluded patients with fractures and those with symptoms not involving the shoulder. The odds ratio was adjusted for confounding factors by binary logistic regression.

Results:

A total of 1331 patient records were evaluated and after applying the selection criteria, 814 patients remained. We found 134 cases of adhesive capsulitis (15.6%). The peak of incidence was at 60-64 years in the patients of Asian ethnicity and at 55-59 years in the other patients. The unadjusted odds ratio was 4.2 (CI 95%, 2.4-7.4), while the odds ratio adjusted for sex and diabetes mellitus was 3.6 (CI 95%, 2.0-6.5).

Conclusion:

Patients of Asian ethnicity showed an independent risk factor for the development of adhesive capsulitis, with an adjusted odds ratio of 3.6. Adhesive capsulitis was more common between 55 and 64 years.

Keywords:
Risk factors; Adhesive capsulitis; Race or ethnic group distribution; Comparative study; Shoulder; Etiology

Diagnosis	n	%
Rotator cuff	539	66.2
Rotator cuff tendinopathy	321	39.4
Partial rotator cuff tear	108	13.3
Complete rotator cuff tear	115	14.1
Adhesive capsulitis	134	15.6
Calcific tendinitis	36	4.4
Shoulder instability	26	3.2
SLAP tear	18	2.2
Glenohumeral arthritis	14	1.7
Acromioclavicular arthritis	10	1.2
Other	32	3.9

Total	814	100

	Asian ethnicity (n = 55)		p Other ethnicities (n = 759)		p
	n	%	n	%	p
Sex
Male	20	36.4	345	45.5	0.191
Female	35	63.6	414	54.5

Hypothyroidism
Yes	6	10.9	69	9.1	0.653
No	49	89.1	690	90.9

Diabetes
Yes	17	30.9	91	12.0	<0.001
No	38	69.1	668	88.0

Heart disease
Yes	1	1.8	12	1.6	0.600
No	54	98.2	747	98.4

Neurological disease
Yes	0	0.0	13	1.7	0.400
No	55	100.0	746	98.3
Age	56.8 (±9.8)		54.4 (±10.7)		0.957

		Asian ethnicity		Total
		Yes	No	Total
Capsulitis	Yes	23	111	134
Capsulitis	No	32	648	680
	Total	55	759	814

	Confidence interval 95%			p
	Lower	Upper
Unadjusted odds ratio	4.2	2.4	7.4
Adjusted odds ratio^a a Adjusted for sex and diabetes mellitus.	3.6	2.0	6.5	< 0.001

Sociedade Brasileira de Ortopedia e Traumatologia Al. Lorena, 427 14º andar, 01424-000 São Paulo - SP - Brasil, Tel.: 55 11 2137-5400 - São Paulo - SP - Brazil
E-mail: rbo@sbot.org.br

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[1] *Corresponding author. E-mail: eduardomalavolta@gmail.com (E.A. Malavolta).

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Asian ethnicity: a risk factor for adhesive capsulitis?☆ ☆ Study conducted at Grupo de Ombro e Cotovelo, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.

ABSTRACT

Objective:

Methods:

Results:

Conclusion:

Asian ethnicity: a risk factor for adhesive capsulitis?^☆ ☆ Study conducted at Grupo de Ombro e Cotovelo, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.