Skip to main content

Table 3 Studies with a prevalence of absent or reversed end diastolic flow greater than zero

From: Prevalence of abnormal umbilical arterial flow on Doppler ultrasound in low-risk and unselected pregnant women: a systematic review

Study Design Study population AEDF prevalence
Low risk women
 Souka 2012 [36] Cross-sectional study 2189 low-risk women in Greece 1/1289 (0.05%)
 Mason 1993 [32] RCT 863 low-risk, nulliparous women in the UK (Doppler arm only) 2/863 (0.23%)
Unselected risk women
 Davies 1992 [31] RCT 1246 unselected-risk women in the UK (Doppler arm only) 1/1246 (0.08%)
 Beattie 1989 [34] Cohort 2097 unselected-risk women in USA 6/2097 (0.29%)
 Nkosi 2019 [37] Cohort 2868 unselected-risk women in South Africa 38/2868 (1.32%)
 Yoon 1993 [38] Cohort 328 unselected women in South Korea 7/328 (2.13%)a
  1. Results of all included studies are in Additional file 3: Appendix S3
  2. aDefined as AEDF or REDF