Tabela 1. Estratégia de busca bibliográfica para estudos observacionais realizada em cada base eletrônica, em 12/12/2013.

Base eletrônica	Estudos	Estratégia de busca
Medline (via PubMed)	3.263	((((((((((((((Transplantation, Kidney) OR Kidney Transplantations) OR Transplantations, Kidney) OR Transplantation, Renal) OR Renal Transplantation) OR Renal Transplantations) OR Transplantations, Renal) OR Grafting, Kidney) OR Kidney Grafting)) OR (Kidney Transplantation) OR (“Kidney Transplantation”[Mesh) AND (((((male[Title/Abstract) OR female[Title/Abstract) OR gender[Title/Abstract)) OR (((((((((Factor, Sex) OR Factors, Sex) OR Sex Factor)) OR (Sex Factors)) OR (“Sex Factors”[Mesh)) OR (((((((Characteristic, Sex) OR Characteristics, Sex) OR Sex Characteristic) OR Sex Differences) OR Difference, Sex) OR Differences, Sex) OR Sex Difference)) OR (Sex Characteristics)) OR (“Sex Characteristics”[Mesh))) AND Humans[Mesh)) AND ((((“Cohort Studies”[Mesh) OR (cohort study) OR (studies, cohort) OR (study, cohort) OR (concurrent studies) OR (studies, concurrent) OR (concurrent study) OR (study, concurrent) OR (historical cohort studies) OR (studies, historical cohort) OR (cohort studies, historical) OR (cohort study, historical) OR (historical cohort study) OR (study, historical cohort) OR (analysis, cohort) OR (analysis, cohort) OR (cohort analyses) OR (cohort analysis) OR (closed cohort studies) OR (cohort studies, closed) OR (closed cohort study) OR (cohort study, closed) OR (study, closed cohort) OR (studies, closed cohort) OR (incidence studies) OR (incidence study) OR (studies, incidence) OR (study, incidence) OR (cohort studies) OR (cohort) OR (cohort analysis) OR (cohort study) OR (prospective cohort) OR (retrospective cohort) OR (retrospective cohort study) OR (prospective cohort study) OR (“Follow-Up Studies”[Mesh) OR (follow up studies) OR (follow-up study) OR (studies, follow-up) OR (study, follow-up) OR followup studies OR (followup study) OR (studies, followup) OR (study, followup) OR (“Epidemiologic Studies”[Mesh OR “Cross-Sectional Studies”[Mesh OR “Retrospective Studies”[Mesh OR “Longitudinal Studies”[Mesh OR “Prospective Studies”[Mesh))) OR ((case* AND and control*[Text Word))))
Embase	2.363	‘kidney transplantation’/exp ANDembase/lim AND ‘gender and sex’/exp ANDembase/lim OR ‘sex difference’/exp ANDembase/lim OR ‘gender’/exp ANDembase/lim OR ‘sex ratio’/exp ANDembase/lim AND (‘cohort analysis’/de OR ‘comparative study’/de OR ‘control group’/de OR ‘controlled study’/de OR ‘human’/de OR ‘observational study’/de OR ‘outcomes research’/de OR ‘prospective study’/de OR ‘retrospective study’/de)
Central	280	(“Transplantation, Kidney” OR “Kidney Transplantations” OR “Transplantations, Kidney” OR “Transplantation, Renal” OR “Renal Transplantation” OR “Renal Transplantations” OR “Transplantations, Renal” OR “Grafting, Kidney” OR “Kidney Grafting” OR “Kidney Transplantation” OR “MeSH descriptor:Kidney Transplantation 1 tree(s) exploded”) AND (“male” OR “female” OR “gender” OR “Factor, Sex” OR “Factors, Sex” OR “Sex Factor” OR “Sex Factors” OR “MeSH descriptor:Sex Factors explode all trees”) AND “Characteristic, Sex” OR “Characteristics, Sex” OR “Sex Characteristic” OR “Sex Differences” OR “Difference, Sex” OR “Differences, Sex” OR “Sex Difference” OR “Sex Characteristics” OR “MeSH descriptor:Sex Characteristics explode all trees”) AND (“graft rejection OR MeSH descriptor:Graft Rejection explode all trees”) AND (“survival rate” “MeSH descriptor:Survival Rate explode all trees”) AND “graft survival”
Lilacs	87	(tw:(transplantation kidney)) OR (tw:(transplantation renal)) AND (tw:(gender differences)) OR (tw:(gender Characteristics)) OR (tw:(Sex Characteristics)) OR (tw:(sex differences)) AND (tw:(survival rate)) AND (tw:(survival graft))