[Schulthess Hip Score (5 items) for assessing disability in patients undergoing total hip arthroplasty. Development and validation].
BACKGROUND
We developed and validated a five-item self-report questionnaire for assessing disability as defined by the International Classification of Functioning, Disability, and Health conceptual model in patients with hip osteoarthritis (OA).


METHODS
The psychometric properties of the new score (Schulthess hip score, SHS) were examined in 105 consecutive patients (mean age 63 years; 48 women) undergoing total hip arthroplasty (THA).


RESULTS
The completion rate (97%) and reproducibility (intraclass correlation coefficient 0.90) of the SHS were excellent. Exploratory factor analysis indicated that all items that loaded on one factor only that accounted for 69.4% of the total variance. Cronbach's alpha was 0.88. Evidence of validity was provided by moderate to high correlations (r=-0.37-0.78) with the scores of traditionally used self-reported outcome measures. The SHS was very responsive, with an effect size of 2.15 and a standardized response mean of 1.74 for changes recorded 6 months after THA.


CONCLUSIONS
These results provide evidence to support use of the SHS for assessing disability in patients with hip OA.
Naal
F D
FD
Gelenkzentrum Untere Extremitäten, Schulthess Klinik, Lengghalde 2, CH-8008, Zürich, Schweiz. florian.naal@gmail.com
Impellizzeri
F M
FM
Wasmer
M
M
Mannion
A F
AF
Leunig
M
M
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000706:statistics & numerical data*; D015331:Cohort Studies; D004185:Disability Evaluation; D005260:Female; D005271:Femur Head Necrosis / Q000145:classification / Q000601:surgery; D005858:Germany; D006618:Hip Dislocation, Congenital / Q000145:classification / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000145:classification* / Q000601:surgery*; D015203:Reproducibility of Results; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires
Qual Life Res. 2002 May;11(3):193-205
12074258
Arthritis Rheum. 2008 Jun 15;59(6):841-8
18512719
J Bone Joint Surg Br. 1996 Mar;78(2):185-90
8666621
Clin Orthop Relat Res. 2009 Apr;467(4):958-65
18587624
J Arthroplasty. 1998 Dec;13(8):890-5
9880181
J Health Econ. 2002 Mar;21(2):271-92
11939242
J Clin Epidemiol. 1998 Nov;51(11):1171-8
9817135
Med Care. 1995 Apr;33(4 Suppl):AS264-79
7723455
Med Care. 1996 Mar;34(3):220-33
8628042
J Rheumatol Suppl. 1995 Feb;43:49-51
7752137
J Bone Joint Surg Br. 2004 Aug;86(6):801-8
15330018
J Rehabil Med. 2005 Jul;37(4):212-8
16024476
Sports Med. 2000 Jul;30(1):1-15
10907753
J Clin Epidemiol. 1997 Mar;50(3):239-46
9120522
Qual Life Res. 2007 Jun;16(5):815-22
17351823
Psychometrika. 1951 Jun;16(2):167-88
14844557
J Clin Epidemiol. 1999 Mar;52(3):193-7
10210236
J Arthroplasty. 2006 Oct;21(7):998-1004
17027542
Osteoarthritis Cartilage. 2008 Sep;16(9):1032-8
18602281
J Rheumatol. 1988 Dec;15(12):1833-40
3068365
Arthritis Rheum. 2006 Jun 15;55(3):480-92
16739188
J Am Acad Orthop Surg. 1993 Nov;1(2):122-129
10675863
Ann Rheum Dis. 1957 Dec;16(4):494-502
13498604
J Bone Joint Surg Am. 2005 Sep;87(9):1999-2005
16140815
J Clin Epidemiol. 2007 Jan;60(1):34-42
17161752
BMC Musculoskelet Disord. 2003 May 30;4:10
12777182
Clin Orthop Relat Res. 1985 Sep;(198):43-9
4028566
Clin Orthop Relat Res. 2009 Apr;467(4):952-7
18726655
Arthritis Rheum. 2007 May 15;57(4):633-8
17471534
Z Rheumatol. 1996 Jan-Feb;55(1):40-9
8868149
J Bone Joint Surg Am. 2004 May;86(5):963-74
15118039
J Clin Epidemiol. 1997 Mar;50(3):233-8
9120521