Impact of being underweight on peri-operative and post-operative outcomes of total knee or hip arthroplasty: A meta-analysis

Table 1 Search strategy

Database	Search strategy	Results
PubMed	((((“Under-weight”) OR (Low body mass index)) OR (malnourished)) AND (((("total knee arthroplasty"[All Fields]) OR ("total hip arthroplasty"[All Fields])) OR ("total joint arthroplasty"[All Fields])) OR ("total knee replacement"[All Fields]))) AND (((((mortality) OR (complications)) OR (readmissions)) OR (rehospitalization)) OR (length of hospital stay))	243
CENTRAL	#1 Underweight	25
	#2 Low body mass index
	#3 Malnourished
	#4 #1 OR #2 OR #3
	#5 MeSH descriptor: [Arthroplasty, Replacement, Knee] explode all trees
	#6 MeSH descriptor: [Arthroplasty, Replacement, Hip] explode all trees
	#7 MeSH descriptor: [Arthroplasty, Replacement] explode all trees
	#8 #5 OR #6 OR #7
	#9 #4 AND #8
EMBASE	((((“Under-weight”) OR (Low body mass index)) OR (malnourished)) AND (((("total knee arthroplasty"[All Fields]) OR ("total hip arthroplasty"[All Fields])) OR ("total joint arthroplasty"[All Fields])) OR ("total knee replacement"[All Fields]))) AND (((((mortality) OR (complications)) OR (readmissions)) OR (rehospitalization)) OR (length of hospital stay))	67
WoS	TS=(“under-weight” OR "low body mass index" OR malnourished ) AND TS=("Total knee arthroplasty" OR " Total joint arthroplasty" OR "Total hip arthroplasty") AND TS=(mortality OR complications OR rehospitalization OR readmissions OR “length of hospital stay” )	110
SCOPUS	ALL (“under-weight” OR "low body mass index" OR malnourished) AND ALL ("Total knee arthroplasty" OR " Total joint arthroplasty" OR "Total hip arthroplasty") AND ALL (mortality OR complications OR rehospitalization OR re-admissions OR “length of hospital stay”)	261

MeSH: Medical subheadings; TS: Topic; WoS: Web of science.