Table 5.

Retained candidate terms

MEDLINE		EMBASE
Precision	Specificity	Precision	Specificity
Comparative studies/ Follow-up studies/	Comparative studies/ Follow-up studies/ Time factors/	Controlled study/ Treatment outcome/ Major clinical study/	Controlled study/ Treatment outcome/ Major clinical study/ Clinical trial/
(preoperat$ or pre operat$).mp	(preoperat$ or pre operat$).mp	(preoperat$ or pre operat$).mp
chang$.tw	chang$.tw	chang$.tw	chang$.tw
evaluat$.tw	evaluat$.tw	evaluat$.tw	evaluat$.tw
reviewed.tw	reviewed.tw	reviewed.tw	reviewed.tw
prospective$.tw	prospective$.tw
retrospective$.tw	retrospective$.tw
baseline.tw	baseline.tw		baseline.tw
cohort.tw	cohort.tw
consecutive$.tw
(compare$ or compara$).tw		(compare$ or compara$).tw	(compare$ or compara$).tw
	case series.tw