Obesity in total hip arthroplasty—does it really matter?

Figures & data

Table 1. The trials included

Author	Study type	Groups (BMI)	n	Follow-up	Outcome reported
Andrew et al. 2008	prospective	< 30, 30–40, > 40	1,421	mean 5 years	Survival, loosening, dislocation, complications, OHS
Bergschmidt et al. 2010	prospective	< 25, 25–30, 30–35	100	mean 2 years	HHS, WOMAC
Chee et al. 2010	prospective	< 30, > 30	110	mean 5 years	Survival, loosening, dislocation, complications
Dowsey et al. 2008	retrospective	< 25, 25–30, > 30	1,207	1 year	Infection
Ibrahim et al. 2005	retrospective	< 25, 30–40	459	1 year	Survival, loosening, dislocation, complications
Kessler et al. 2007	prospective	< 25, 25–30, > 30	67	3 months	Complications, WOMAC
Lehman et al. 1994	retrospective	< 30, 30–40, > 40	324	> 2 year	Survival, loosening, dislocation, complications
Lübbeke et al. 2007	prospective	< 30, > 30	2,636	> 5 years	Survival, loosening, dislocation, complications, HHS
McLaughlin et al. 2006	retrospective	< 30, > 30	285	> 10 years	Survival, loosening, dislocation, complications
Namba et al. 2005	retrospective	< 35, > 35	1,071	1 year	Loosening, dislocation, complications
Paterno et al. 1997	retrospective	< 30, > 30	380	> 2 years	Dislocation
Sadr Azodi et al. 2008	implant register	< 25, 25–30, > 30	2,106	mean 2 years	Dislocation
Søballe et al. 1987	retrospective	< 27, > 27	141	> 5 years	Survival, loosening, dislocation, complications
Yeung et al. 2010	retrospective	< 30, > 30	134	2–10 years	Survival, loosening, Harris hip score

Figure 1. PRISMA flow diagram.

Figure 2. Forest plot, dislocations

Figure 3. Forest plot, septic loosening.

Figure 4. Forest plot, aseptic loosening.

Figure 5. Forrest plot, Harris hip score.

Figure 6. Forest plot, infection.

Figure 7. Forest plot, hematoma.

Figure 8. Forest plot, venous thromboembolism.

Figure 9. Forest plot, perioperative fracture.

Table 2. Methodology validity criteria per trial

Author	Selection bias	Performance bias	Attrition bias	Detection bias
Andrew et al. 2008	1/3	1/4	1/2	1/2
Bergschmidt et al. 2010	0/3	1/4	2/2	1/2
Chee et al. 2010	1/3	1/4	2/2	1/2
Dowsey et al. 2008	0/3	1/4	0/2	1/2
Haverkamp et al. 2008	1/3	1/4	2/2	1/2
Ibrahim et al. 2005	1/3	1/4	2/2	1/2
Kessler et al. 2007	0/3	1/4	2/2	1/2
Lehman et al. 1994	1/3	1/4	2/2	1/2
Lübbeke et al. 2007	1/3	1/4	2/2	1/2
McLaughlin et al. 2006	1/3	1/4	2/2	1/2
Namba et al. 2005	0/3	1/4	2/2	1/2
Paterno et al. 1997	0/3	1/4	2/2	0/2
Sadr Azodi et al. 2008	0/3	1/4	1/2	0/2
Søballe et al. 1987	1/3	1/4	2/2	1/2
Yeung et al. 2010	1/3	1/4	1/2	0/2

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