Translation and validation of the new version of the Knee Society Score - The 2011 KS Score - into Brazilian Portuguese

Silva, Adriana Lucia Pastore e; Croci, Alberto Tesconi; Gobbi, Riccardo Gomes; Hinckel, Betina Bremer; Pecora, José Ricardo; Demange, Marco Kawamura

doi:10.1016/j.rboe.2016.08.020

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ORIGINAL ARTICLE • Rev. bras. ortop. 52 (04) • Jul-Aug 2017 • https://doi.org/10.1016/j.rboe.2016.08.020 copy

Translation and validation of the new version of the Knee Society Score - The 2011 KS Score - into Brazilian Portuguese^☆ ☆ Study conducted at Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, Instituto de Ortopedia e Traumatologia, São Paulo, SP, Brazil.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

OBJECTIVE:

Translation, cultural adaptation, and validation of the new version of the Knee Society Score - The 2011 KS Score - into Brazilian Portuguese and verification of its measurement properties, reproducibility, and validity. In 2012, the new version of the Knee Society Score was developed and validated. This scale comprises four separate subscales: (a) objective knee score (seven items: 100 points); (b) patient satisfaction score (five items: 40 points); (c) patient expectations score (three items: 15 points); and (d) functional activity score (19 items: 100 points).

METHOD:

A total of 90 patients aged 55-85 years were evaluated in a clinical cross-sectional study. The pre-operative translated version was applied to patients with TKA referral, and the post-operative translated version was applied to patients who underwent TKA. Each patient answered the same questionnaire twice and was evaluated by two experts in orthopedic knee surgery. Evaluations were performed pre-operatively and three, six, or 12 months post-operatively. The reliability of the questionnaire was evaluated using the intraclass correlation coefficient (ICC) between the two applications. Internal consistency was evaluated using Cronbach's alpha.

RESULTS:

The ICC found no difference between the means of the pre-operative, three-month, and six-month post-operative evaluations between sub-scale items.

CONCLUSION:

The Brazilian Portuguese version of The 2011 KS Score is a valid and reliable instrument for objective and subjective evaluation of the functionality of Brazilian patients who undergo TKA and revision TKA.

Keywords:
Knee; Knee arthroplasty; Scale; Translation; Questionnaires

	Number of patients	Percentage
Preoperative period	43 patients

Gender
Female	35	81.40%
Male	8	18.60%

Side
Right	21	48.80%
Left	22	51.20%

Ethnicity
White	33	76.70%
Black	4	9.30%
Mixed-race	6	14.00%

Surgery
Primary	40	93%
Revision	3	7%

Charnley classification
A	3	7%
B1	34	79.10%
B2	5	11.60%
C3	1	2.30%

	Mean	Minimum	Maximum
Age (years)	63.6	55	85
Height (m)	1.604	1.4	1.9
Weight (kg)	78.12	56	118

	Number of patients	Percentage
Postoperative period	47 patients

Gender
Female	33	70.20%
Male	14	29.80%

Side
Right	28	59.60%
Left	19	40.40%

Ethnicity
Asian	1	2.10%
White	28	59.60%
Black	3	6.40%
Mixed-race	15	31.90%

Surgery
Primary	47	100%
Revision	-	-

Charnley classification
A	5	10.60%
B1	26	55.30%
B2	15	31.90%
C1	1	2.10%

	Mean	Minimum	Maximum
Age (years)	65.71	55	85
Height (m)	1.61	1.47	1.82
Weight (kg)	78.3	51	117

	Preoperative period	Postoperative period
Objective	0.931	0.839
Objective	(95% CI 0.877–0.962)	(95% CI 0.729–0.907)
Symptoms	0.807	0.957
Symptoms	(95% CI 0.672–0.891)	(95% CI 0.924–0.976)
Satisfation	0.879	0.967
Satisfation	(95% CI 0.787–0.932)	(95% CI 0.941–0.981)
Expectation	0.949	0.906
Expectation	(95% CI 0.905–0.972)	(95% CI 0.838–0.946)
Activities	0.966	0.969
Activities	(95% CI 0.937–0.981)	(95% CI 0.945–0.983)

	Preoperative period	Postoperative period
Objective	0.663	0.435
Symptoms	0.312	0.762
Satisfaction	0.791	0.844
Expectation	0.728	0.854
Activity	0.508	0.78

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: adriana_pastore@hotmail.com (A.L. Silva).

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Translation and validation of the new version of the Knee Society Score - The 2011 KS Score - into Brazilian Portuguese☆ ☆ Study conducted at Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, Instituto de Ortopedia e Traumatologia, São Paulo, SP, Brazil.

ABSTRACT

OBJECTIVE:

METHOD:

RESULTS:

CONCLUSION:

Translation and validation of the new version of the Knee Society Score - The 2011 KS Score - into Brazilian Portuguese^☆ ☆ Study conducted at Universidade de São Paulo, Faculdade de Medicina, Hospital das Clínicas, Instituto de Ortopedia e Traumatologia, São Paulo, SP, Brazil.