Appendix 1. Electronic search strategies

MEDLINE and CENTRAL (Ovid platform)

1 exp Mass Screening/
2 screening$.tw.
3 tested.tw.
4 testing.tw.
5 or/1‐4
6 exp Chlamydia/
7 chlam?di$.tw.
8 exp Chlamydia trachomatis/
9 exp Chlamydia Infections/
10 or/6‐9
11 randomized controlled trial.pt.
12 controlled clinical trial.pt.
13 randomized.ab.
14 placebo.ab.
15 clinical trials as topic.sh.
16 randomly.ab.
17 trial.ti.
18 or/11‐17
19 exp animals/ not humans.sh.
20 18 not 19
21 5 and 10 and 20

Note: the CENTRAL search strategy does not include the terms #11 to #20.

EMBASE.com

#1 'mass screening'/exp
#2 screening*:ti,ab
#3 'screening'/exp
#4 tested:ti,ab
#5 testing:ti,ab
#6 #1 OR #2 OR #3 OR #4 OR #5
#7 'Chlamydia'/exp
#8 chlamydi*:ti,ab
#9 chlamidi*:ti,ab
#10 'Chlamydia trachomatis'/exp
#11 'chlamydiasis'/exp
#12 #7 OR #8 OR #9 OR #10 OR #11
#13 'randomized controlled trial'/exp
#14 'single blind procedure'/exp
#15 'double blind procedure'/exp
#16 'crossover procedure'/exp
#17 #13 OR #14 OR #15 OR #16
#18 random*:ab,ti
#19 placebo*:ab,ti
#20 allocat*:ab,ti
#21 crossover*:ab,ti
#22 'cross over':ab,ti
#23 trial:ti
#24 (doubl* NEXT/1 blind*):ab,ti
#25 #18 OR #19 OR #20 OR #21 OR #22 OR #23 OR #24
#26 #17 OR #25
#27 'animal'/de
#28 'animal experiment'/de
#29 'nonhuman'/de
#30 #27 OR #28 OR #29
#31 'human'/de
#32 #30 AND #31
#33 #30 NOT #32
#34 #26 NOT #33
#35 #6 AND #12 AND #34 AND [embase]/lim

LILACS (iAHx interface)

(mh:(tamizaje masivo)) OR (ti:(tamizaje)) OR (ab:(tamizaje)) OR (ti:(tamización)) OR (ab:(tamización)) OR (mh:(cribado)) OR (ti:(cribado)) OR (ab:(cribado)) AND (mh:(chlamydia)) OR (ti:(chlamydi*)) OR (ab:(chlamydi*)) OR (ti:(chlamidi*)) OR (ab:(chlamidi*)) OR (ti:(clamidia*)) OR (ab:(clamidia*)) OR (mh:(chlamydia trachomatis)) OR (mh:(infecciones por chlamydia)) AND db:("LILACS") AND type_of_study:("clinical_trials")

Other resources

“Screening” and “Chlamydia” in title, abstract and keywords.