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Table 1 Relevant data of retrieved studies

From: Risk factors for non-adherent retained placenta after vaginal delivery: a systematic review

Authors, year,
Country
Study Design Study period
(years)
Overall deliveries (n) RP diagnosis
(min) and definition
Prevalence of RP Management
Meyer, 2020
Israel, [12]
Retrospective 8 16,867 60, D 6.5% (including complete and partial retained placenta) Active
Granfors, 2020
Sweden, [13]
Retrospective 6 49,598 NS, E 2.0% NS
Rottenstreich, 2019
Israel [14]
Retrospective 13 170,009 40, C 2.70% Active
Ruiter, 2019 Netherlands [15] Retrospective 11 359,737 NS, E 2.7%, (first pregnancy), 17% (recurrence in second pregnancy) NS
Favilli, 2018
Italy [16]
Retrospective 10 22,749 30, B 0.6% Active
Rotem, 2018
Israel [17]
Retrospective 25 263,053 30, B 0.7% (Hypertenstìyve disorders)
0.6% (No hypertensyve disorders)
Active
Vannuccini, 2018 Italy [18] Retrospective 5 1168 (Spontaneous pregnancies)
188 (ART pregnancies)
NS, E 6.30% (ART pregnancies)
2.8% (spontaneous pregnancies)
NS
Endler, 2017 Sweden [19] Retrospective 40 494,000 30, B 2.4%, (index births) 3.2% (second generation births) Observational + active
Greenbaum, 2017 Israel [9] Retrospective 25 205,522 30, B 4.8% Observational
Anteby, 2017
Israel [7]
Prospective 2 19,359 60, D 1.5% Active
Alufi, 2017
Israel [6]
Retrospective 4 18,146 30, B 0.5% Observational
Berlac, 2017 Denamark [20] Retrospective 14 11,739
(women with endometriosis disease)
NS, E 2.20% Observational
Aziz, 2016
New Jersey [21]
Retrospective 5 769 NS, E 1.05% (ART pregnancies)
1% (spontaneous pregnancies)
NS
Sarit, 2016
Israel [22]
Retrospective 0,5 4227 60, D 1.9% Active
Jackson, 2015 California [23] Retrospective 11 193 (spontaneous pregnancies
185 (ART pregnancies)
NS, E 0% (spontaneous pregnancies)
2.7% (ART pregnancies)
Observational
Shinar, 2015
Israel [24]
Retrospective 5 25,160 60, B 9.00% Active
John, 2015
Nigeria [25]
Retrospective 5 15,789 30, B 0.59% Observational
Coviello, 2015 USA [3] Retrospective 6 228,562 30, B 1.12% Observational
Torricelli, 2015 Italy [26] Prospective 3 2354 NS, E NS Observational
Ashwal, 2014 Israel [27] Retrospective 5 33,925 30, B 1.4% Active
Endler, 2014 Sweden [2] Retrospective 12 386,607 NS, E 2.17% Active
Magann, 2013 USA [28] Retrospective 2 452 15, A NS Observational
Nikolajsen, 2013 Denmark [29] Retrospective 9 10,334 30, B 2.60% Observational
Endler, 2012 Sweden [30] Retrospective 3 16,209 30, B 2.6% Active
Farhi, 2010
Israel [31]
Retrospective 2 280 NS, E NS NS
Obajimi, 2009 Nigeria [32] Retrospective 5 4980 30, B 2.13% Observational
Rizwan, 2009 Pakistan [33] Retrospective + prospective 3 8782 30, B 1.02% Active
Owolabi, 2008 Nigeria [34] Prospective 7 6160 30, B 1.9% Observational + active
Panpaprai, 2007 Thailand [35] Retrospective 3 234 (78 cases, 156 controls) 30, B NS Observational
Chhabra, 2002 India [8] Retrospective 15 29,784 NS, E 0.23% Observational + active
Titz, 2001
Australia [36]
Retrospective 7 3734 60, D 3.00% Observational
Adelusi, 1997 Saudi Arabia [37] Retrospective 5 22,045 NS, E 0.06% Observational
Soltan, 1997
Saudi Arabia [38]
Retrospective 6 26,315 60, D 0.55% Observational
Golan, 1996
Israel [39]
Retrospective NS NS NS NS NS
Dombrowski, 1995
Michigan [40]
Prospective 9 45,852 30, B 2.00% Active
Combs, 1991 California [41] Retrospective 11 12,979 30, B 3.3% Observational
Romero,1990 Connecticut [42] Retrospective 2 792 30, B 3.40% Observational
  1. NS Not Specified, RP Retained Placenta, ART Assisted Reproductive Technologies
  2. RP Definition A: third stage of labor lasting > 15 min
  3. RP Definition B: failure to deliver placenta after a 30-min duration of an uncomplicated third stage
  4. RP Definition C: failure to deliver placenta after a 40-min or more duration of an uncomplicated third stage
  5. RP Definition D: failure to deliver placenta after a 60-min or more duration of an uncomplicated third stage
  6. RP Definition E: placenta that requires manual removal