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Total hip replacement - College of Occupational Therapists

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Appendix 5: Evidence- based review tables<br />

Source Design and participants Intervention Outcomes Results Quality and comment<br />

Wang et al (2010) Prospective cohort study<br />

Aim: to investigate factors<br />

affecting the short-term<br />

outcome <strong>of</strong> primary total <strong>hip</strong><br />

<strong>replacement</strong> and develop a<br />

multivariate regression<br />

equation to predict the shortterm<br />

outcome<br />

Elective primary total <strong>hip</strong><br />

<strong>replacement</strong> – single service<br />

82% had concurrent preoperative<br />

co- morbidities<br />

n=97 (101 THR)<br />

Mean age 61.65 years<br />

Male: female ratio = 35:65<br />

<strong>Total</strong> <strong>hip</strong> <strong>replacement</strong><br />

Four surgeons involved.<br />

Self-administered<br />

WOMAC at enrolment, 3<br />

months, 1 year and 2<br />

years post- operatively.<br />

Statistically significant measure that<br />

indicates three main factors in<br />

predicting THR outcomes are: preoperative<br />

WOMAC Physical Function<br />

Score (p=0.0001), gender (p=0.0159)<br />

and pre- operative co- morbidities<br />

(p=0.0246)<br />

Predictive model derived and trialled<br />

however needs further study on its<br />

validity to THR<br />

Service users with better preoperative<br />

functional scores likely to<br />

have higher post- operative scores,<br />

and service users with poorer preoperative<br />

scores likely to experience<br />

greater improvement in function.<br />

Grade C – Low<br />

Limitations:<br />

• Sample size – only 101 <strong>hip</strong>s<br />

in regression analysis<br />

• Have not stated what is<br />

meant by outcome postoperatively,<br />

e.g.<br />

independent, working,<br />

back to normal<br />

• The pre- operative WOMAC<br />

scores had a large standard<br />

deviation therefore<br />

possible decrease in<br />

accuracy <strong>of</strong> prediction.<br />

United States <strong>of</strong> America.<br />

Wong et al (2002) Prospective study<br />

Aim: to describe the hospital<br />

recovery pattern <strong>of</strong> older<br />

confused and non- confused<br />

service users after <strong>hip</strong> surgery<br />

Recruitment: consecutive<br />

admissions to a teaching<br />

hospital for emergency/elective<br />

<strong>hip</strong> surgery<br />

n=54 (not confused on<br />

admission). 28 admitted for<br />

osteoarthritis, 4 for revision<br />

THR and 22 fractured neck <strong>of</strong><br />

femur<br />

Mean age 75.6 years<br />

Male: female ratio = 19:35<br />

Canada.<br />

Hip surgery – both<br />

elective and trauma<br />

Measurement <strong>of</strong> the<br />

effect <strong>of</strong> post- operative<br />

acute confusion on<br />

recovery pattern <strong>of</strong><br />

older confused and<br />

non- confused service<br />

users after <strong>hip</strong> surgery.<br />

Assessed at baseline and<br />

on first 4 post- operative<br />

days<br />

• Cognitive status (using<br />

Confusion Assessment<br />

Method)<br />

• Physiological status<br />

• Functional ability (Katz<br />

index <strong>of</strong> Activities <strong>of</strong><br />

Daily Living)<br />

• Sleep satisfaction (using<br />

adapted form <strong>of</strong><br />

Bowan’s method)<br />

• Perceived discomfort<br />

(Discomfort Screen-<br />

Dementia Alzheimer<br />

Type).<br />

LOS examined in context<br />

<strong>of</strong> acute confusion.<br />

Older confused and non- confused<br />

service users recover from <strong>hip</strong><br />

surgery differently. Majority <strong>of</strong><br />

service users who developed acute<br />

confusion were hospitalised for<br />

fractured neck <strong>of</strong> femur<br />

• Of 54 service users, at least 12<br />

(23%) developed acute confusion<br />

at some point after surgery<br />

• Confused and non- confused<br />

differed significantly in age,<br />

admission diagnosis and LOS<br />

(p

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