research into context

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All research papers (including systematic reviews/metaanalyses) submitted to any journal in The Lancet family must include a panel putting their research into context with previous work in the format outlined below (see Lancet 2014; 384: 2176– 77, for the original rationale). This panel should not contain references. Editors will use this information at the first assessment stage and peer reviewers will be specifically asked to check the content and accuracy

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https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(14)62047-X/fulltext

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Editors will use this information at the fi rst assessment stage and when presenting papers after peer review to the editorial team. Peer reviewers will be specifi cally asked to check the content and accuracy of the panel.

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Panel: Research in context

Evidence before this study

This section should include a description of all the evidence that the authors considered before undertaking this study. Authors should state: the sources (databases, journal or book reference lists, etc) searched; the criteria used to include or exclude studies (including the exact start and end dates of the search), which should not be limited to English language publications; the search terms used; the quality (risk of bias) of that evidence; and the pooled estimate derived from meta-analysis of the evidence, if appropriate.

Added value of this study

Authors should describe here how their fi ndings add value to the existing evidence (including an updated meta-analysis, if appropriate).

Implications of all the available evidence

Authors should state the implications for practice or policy and future research of their study combined with existing evidence.

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[@Wuerz2014] Inkluderar perioperativa variabler och studerar endast inhospital deaths. N = 3241 (varv 1481 primär höftprotes). Logistisk regression med endast kliniskt relevanta variabler (ingen varibelselektion). Kollar både kalibrering och diskriminering. Presenterar nomogram. bootstrap-corrected concordance index of 0.76.

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[@Ondeck2018]: Jämför ECI, CCI och annat index och konstaterar att av dessa är ECI bäst.

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2Dsearch for PuBmed:

(femur OR hip OR bone OR bones OR osteoarthritis OR rheumatoid OR rheumatism) AND (prognostic OR prediction OR forecast OR forecasting OR forecasts OR predict OR predicted OR predicting OR predictions OR predicts OR projections) AND (death OR mortality OR deaths OR survival OR survive) AND (replacement OR replaced OR replacements OR arthroplasty OR "Arthroplasty, Replacement" OR prosthesis OR implant OR prostheses OR prosthetic OR prosthetics) AND (calibration OR calibrate OR calibrated OR validation OR validate OR validated OR validating OR validity OR precision OR accuracy OR accurate OR precise OR "external validation" OR evaluation OR verification OR internal) AND (build OR building OR construct OR create OR develop OR establish OR train OR derive OR derivation) AND (models OR modelling OR "statistical model" OR modeling) AND (comorbidity OR comorbid OR co-morbid OR co-occurring OR diagnoses OR co-morbidity OR Elixhauser OR Charlson OR "comorbidity index" OR "comorbidity score" OR "Rx Risk V" OR ASA)

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