1. Performance of screening questionnaires for obstructive sleep apnea during pregnancy: A systematic review and meta-analysis 
Visasiri Tantrakul, Pawin Numthavaj, Christian Guilleminault, Mark McEvoy, Panyu Panburana, Win Khaing, John Attia, Ammarin Thakkinstian 
Sleep Medicine Reviews 
Volume 36, Pages (December 2017)
DOI: /j.smrv
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2. Fig. 1
PRISMA34 flow chart of selection of studies. Abbreviations: OSA = obstructive sleep apnea; PRISMA = preferred reporting items for systematic reviews and meta-analysis.
Sleep Medicine Reviews  , DOI: ( /j.smrv )
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3. Fig. 2
Quality assessment for diagnostic test of the included studies according to the QUADAS-2 tool: proportion of studies with low, high, or unclear RISK of BIAS.
Sleep Medicine Reviews  , DOI: ( /j.smrv )
Copyright © 2016 The Authors Terms and Conditions

4. Fig. 3
Quality assessment for diagnostic test of the included studies according to the QUADAS-2 tool: proportion of studies with low, high, or unclear concerns regarding applicability.
Sleep Medicine Reviews  , DOI: ( /j.smrv )
Copyright © 2016 The Authors Terms and Conditions

5. Fig. 4
Forest plot for Berlin questionnaire in screening OSA during pregnancy. Abbreviations: CI = confidence interval; df = degree of freedom; OSA = obstructive sleep apnea.
Sleep Medicine Reviews  , DOI: ( /j.smrv )
Copyright © 2016 The Authors Terms and Conditions

6. Fig. 5
Summary receiver operator curve (SROC) of Berlin questionnaire for diagnosis of OSA during pregnancy. Abbreviations: AUC = area under the curve; SENS = sensitivity; SPEC = specificity; SROC = summary receiver operator curve.
Sleep Medicine Reviews  , DOI: ( /j.smrv )
Copyright © 2016 The Authors Terms and Conditions

7. Fig. 6
Fagan plot of Berlin questionnaire for diagnosis of OSA during pregnancy. Abbreviations: LR_negative = likelihood ratio negative; LR_positive = likelihood ratio positive; OSA = obstructive sleep apnea; Post_Prob_neg = posterior probability negative; Post_Prob_Pos = posterior probability positive; Prior Prob = prior probability.
Sleep Medicine Reviews  , DOI: ( /j.smrv )
Copyright © 2016 The Authors Terms and Conditions