Comparison between ceramic-on-polyethylene versus metal-on-polyethylene prostheses in Total Hip Arthroplasties: a systematic review and meta-analysis

person Ighor Alexander Zamuner Spir

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Adriano Anzai

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Armelim Utino

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Haroldo Katayama

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Giuliano Tosello

Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Mary Martins Nery

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Mauricio Anhesini

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Oswaldo Silvestrini Tiezzi

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Pericles Otani

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolUnimed, Evidence-Based Medicine Center – Presidente Prudente (SP), Brazil.

person Wanderley Marques Bernardo *

Data curation · Formal analysis · Writing – original draft · Writing – review & editing

schoolFederação das Unimeds do Estado de São Paulo, Federal Council of Medicine – São Paulo (SP), Brazil.

person*Corresponding author:
emailwmbernardo@usp.br

Conflicts of interest: the authors declare there is no conflicts of interest.

Author/Year	Randomization	Blinded allocation	Double blind	Evaluator blinding	Losses	Prognostic characteristics	Outcomes	ITT	Sample calculation	Early interruption
Bjorgul, et al.¹⁶
Ise, et al.¹⁷
Jassim, et al.¹⁸
Jonsson, et al.¹⁹
Kadar, et al.²⁰
Kawate, et al.²¹
Kim²²
Kraay, et al.²³
Morison, et al.²⁴
Nakahara, et al.²⁵
Zaoui, et al.²⁶
Bergvinsson, et al.²⁷
Kayani, et al.²⁸

Certainty assessment							N^o of patients		Effect		Certainty	Importance
N^o of studies	Study design	Risk of bias	Inconsistency	Indirectness	Imprecision	Other considerations	Intervention (%)	Comparison (%)	Relative (95%CI)	Absolute (95%CI)	Certainty	Importance
1. Linear wear (mm/y) XLPE
9	Randomized trials	Seriousa,b	Not serious	Not serious	Not serious	None	448	443	–	MD 0 (0.01 minor to 0)	⊕⊕⊕◯ moderate
2. Linear wear (mm/y) UHMWPE
4	Randomized trials	Seriousa,b	Not serious	Not serious	Not serious	None	67	71	–	MD 0 (0.04 minor to 0.05 higher)	⊕⊕⊕◯ moderate
3. Surgical reviews
7	Randomized trials	Seriousa,b	Not serious	Not serious	Seriousc	None	2/400 (0.5)	5/400 (1.3)	Not estimable	10 more for 1.000 (from 10 less to 20 more)	⊕⊕◯◯ low
4. Head size
11	Randomized Trials	Very seriousa,b,d	Very seriouse	Very seriouse	Seriousc	None	518	536	–	SMD 0.75 higher (0.52 lowest to 2.03 highest)	⊕◯◯◯ very low
5. Harris hip score (HHS)
5	Randomized trials	Very seriousa,b,d	Not serious	Not serious	Seriousc	None	147	155	–	MD 5.02 smaller (7.3 minor to 2.73 minor)	⊕◯◯◯ very low

Abstract