Table 2 Database search strategy

OVERVIEW

Interface:

Ovid

Databases:

MEDLINE All (1946-present)

Date of Search:

March 5, 2019

Alerts:

Monthly search updates until manuscript submission

Study Types:

No filters were applied to limit the retrieval by study type

Limits:

Publication date limit: none

Language limit: English

SYNTAX GUIDE

/

At the end of a phrase, searches the phrase as a subject heading

MeSH

Medical Subject Heading

exp

Explode a subject heading

*

Before a word, indicates that the marked subject heading is a primary topic;

or, after a word, a truncation symbol (wildcard) to retrieve plurals or varying endings

?

Truncation symbol for one or no characters only

adj#

Requires terms to be adjacent to each other within # number of words (in any order)

.ti

Title

.ab

Abstract

.hw

Heading word; usually includes subject headings and controlled vocabulary

.kf

Author keyword heading word

#

Searches

1

((updating or existing systematic review* or “out-of-date” or outdated or up-to-dateness or redundant or redundancy or incorporating or overlap* or choosing or selecting or deciding or integrating or discordan* or concordan* or replicat*) and (systematic review* or comparative effectiveness review* or overviews of reviews or overview of reviews or Cochrane review* or meta-analyses)).ti,kf.

2

(de novo adj3 review*).ti,ab,kf.

3

(overview of reviews or overviews of reviews or overview of systematic reviews or overviews of systematic reviews).ti,ab,kf.

4

(overview of overviews or overviews of overviews).ti,ab,kf.

5

((updat* adj2 review*) or (updat* adj2 systematic review*) or (updat* adj2 comparative effectiveness review*)).ti,ab,kf.

6

review design.ti,ab,kf.

7

(existing review* or existing systematic review* or existing comparative effectiveness review*).ti,ab,kf.

8

(umbrella review* or umbrella systematic review*).ti,ab,kf.

9

(review of reviews or reviews of reviews or review of systematic reviews or reviews of systematic reviews).ti,ab,kf.

10

(incorporating adj3 review*).ti,ab,kf.

11

multiple systematic review*.ti,ab,kf.

12

(synthes?s adj4 review*).ti,ab,kf.

13

secondary evidence.ti,ab,kf.

14

(previous review* or previous systematic review*).ti,ab,kf.

15

(overlap* adj3 review*).ti,ab,kf.

16

(conduct* adj3 (overviews of reviews or systematic review* or comparative effectiveness review*)).ti,kf.

17

or/2-16

18

(guidance or methodolog* or consensus).ti,hw,kf. or *meta-analysis as topic/ or *review literature as topic/

19

17 and 18

20

((choos* or select* or appropriate* or decid* or decision* or guidance or methodology*) adj4 (review design or review type)).ti,ab,kf.

21

(updating review* or updating systematic review* or updating comparative effectiveness review*).ti,ab,kf.

22

(integrating review* or integrating systematic review* or integrating comparative effectiveness review*).ti,ab,kf.

23

(de novo review* or de novo systematic review*).ti,ab,kf.

24

(discordant review* or discordant systematic review* or discordant comparative effectiveness review*).ti,ab,kf.

25

(replicat* adj3 systematic review*).ti,ab,kf.

26

up-to-date systematic reviews.ti,ab,kf.

27

when is an update an update.ti.

28

or/20-27

29

1 or 19 or 28

30

limit 29 to english language

31

remove duplicates from 30