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Tratamiento antiadherencias después de una histeroscopia quirúrgica para la subfertilidad femenina

Appendices

Appendix 1. CGF Specialised Register search strategy

Procite platform

Keywords CONTAINS "hysteroscopy" or "hysteroscopy pain" or "hysteroscopy pain ‐surgical" or "hysteroscopy, techniques" or "hysteroscope " or "office hysteroscopy" or "operative hysteroscopy" or Title CONTAINS "hysteroscopy" or "hysteroscopy pain" or "hysteroscopy pain ‐surgical" or "hysteroscopy, techniques" or "hysteroscope " or "office hysteroscopy" or "operative hysteroscopy"
AND
Keywords CONTAINS "adhesiolysis" or "adhesion" or "adhesions" or "adhesions outcome" or "adhesion prevention" or "adhesion formation" or "pelvic adhesions" or "Sepracoat" or "icodextrin" or "hydrogel" or "hydrotubation" or "Seprafilm" or "intergel" or "Barrier Membrane" or "hyaluronan" or "hyaluronic acid" or "hyaluronidase" or "Promethazine" or "dextran" or "SprayGel" or "adhesion barrier" or "adhesion barriers" or "post‐operative adhesions" or "gynecologic surgical procedure" or "pelvic adhesions" or "amnion graft" or "antibiotics" or "*Estrogens" or "Estrogen" or "oestrogen" or "intrauterine device" or "Intrauterine Devices, Medicated" or "Intrauterine Releasing Devices" or Title CONTAINS "adhesiolysis" or "adhesion" or "adhesions" or "adhesions outcome" or "adhesion prevention" or "adhesion formation" or "pelvic adhesions" or "Sepracoat" or "icodextrin" or "hydrogel" or "hydrotubation" or "Seprafilm" or "intergel" or "Barrier Membrane" or "hyaluronan" (

11 records

Database: Search strategy for JB1900 in the Cochrane Gynaecology and Fertility specialised register was rerun and date limited from 01.01.15 (last search) to 07.06.17
Most recent update: 7 June 2017

Appendix 2. CENTRAL search strategy

#1MeSH descriptor: [Hysteroscopy] explode all trees (403)
#2hysteroscopic surgery (309)
#3operative hysteroscopy (212)
#4synechiolysis (6)
#5#1 or #2 or #3 or #4 (639)
#6barrier agent (816)
#7hyaluronic acid gel (218)
#8intrauterine balloon (116)
#9amnion graft (52)
#10estrogen treatment (6,178)
#11MeSH descriptor: [Intrauterine Devices] explode all trees (616)
#12MeSH descriptor: [Anti‐Bacterial Agents] explode all trees (10,749)
#13#6 or #7 or #7 or #8 or #9 or #10 or #11 or #12 (18,605)
#14intrauterine adhesions (119)
#15adhesion score (566)
#16reproductive outcome (4,098)
#17#14 or #15 or #16 (4,665)
#18#5 and #13 and #17 Publication Year from 2015 to 2017 (14)

Cochrane reviews (7)
Other reviews (0)
Trials (7)

14 records

Database: Cochrane Database of Systematic Reviews: Issue 6 of 12, June 2017

Most recent update: 6 June 2017

Appendix 3. MEDLINE search strategy (PubMed)

(((((randomized controlled trial[pt] OR controlled clinical trial[pt] OR randomized[tiab] OR placebo[tiab] OR "drug therapy"[Subheading] OR randomly[tiab] OR trial[tiab] OR groups[tiab]) NOT ("animals"[MeSH Terms] NOT "humans"[MeSH Terms]))) AND ((((reproductive outcome) OR adhesion score) OR intrauterine adhesions) OR "Gynatresia"[Majr])) AND (((((((((("Anti‐Bacterial Agents"[Majr]) OR "Intrauterine Devices"[Mesh]) OR estrogen treatment) OR amnion graft) OR intrauterine balloon) OR gel) OR hyaluronan) OR hyaluronic acid gel) OR barrier agents) OR adhesion prevention)) AND (((((synechiolysis) OR operative hysteroscopy) OR "Gynecologic Surgical Procedures"[Majr]) OR hysteroscopic surgery) OR "Hysteroscopy"[Majr])

21 records

Database: MEDLINE using PubMed

Most recent update: 6 June 2017

Appendix 4. Embase search strategy (Embase.com)

#1'hysteroscopy'/exp OR 'hysteroscopy'(10,800)
#2hysteroscopic AND 'surgery' (3,504)
#3gynaecological AND 'surgery' (15,150)
#4operative AND 'hysteroscopy'(1,775)
#5synechiolysis (82)
#6#1 OR #2 OR #3 OR #4 OR #5 (25,733)
#7'adhesion'/exp AND 'prevention' (2,460)
#8barrier AND agents (11,435)
#9hyaluronic AND 'acid'/exp AND 'gel'/exp (28)
#10'hyaluronan'/exp (33,533)
#11'gel'/exp (55,900)
#12'intrauterine'/exp AND 'balloon'/exp (602)
#13'amnion'/exp AND graft (735)
#14'estrogen'/exp AND treatment (79,899)
#15'intrauterine'/exp AND 'device'/exp (22,666)
#16'antibiotics'/exp (1,175,044)
#17#7 OR #8 OR #9 OR #10 OR #11 OR #12 OR #13 OR #14 OR #15 OR #16 (1,365,328)
#18'intrauterine'/exp AND 'adhesions'/exp (465)
#19'adhesion'/exp AND score (937)
#20reproductive AND outcome (44,546)
#21#18 OR #19 OR #20 (45,864)
#22#6 AND #17 AND #21 (342)
#23'clinical trial'/exp (1,201,041)
#24'randomized controlled trial'/exp (447,991)
#25'randomization'/exp (73,693)
#26'single blind procedure'/exp (27,124)
#27'double blind procedure'/exp (137,917)
#28'crossover procedure'/exp (51,040)
#29'placebo'/exp (305,105)
#30randomi?ed AND controlled AND trial* AND [embase]/lim (554,250)
#31rct AND [embase]/lim (23,901)
#32'random allocation'/exp AND [embase]/lim (46,023)
#33'randomly allocated' AND [embase]/lim (23,118)
#34'allocated randomly' AND [embase]/lim (1,917)
#35allocated NEAR/2 random AND [embase]/lim (766)
#36'single blind$' AND [embase]/lim (29,481)
#37'double blind$' AND [embase]/lim (193,062)
#38(treble OR triple) NEAR/2 blind$ AND [embase]/lim (591)
#39placebo$ AND [embase]/lim (364,742)
#40'prospective study'/exp (372,790)
#41#23 OR #24 OR 25 OR #26 OR #27 OR #28 OR #29 OR #30 OR #31 OR #32 OR #33 OR #34 OR #35 OR #36 OR #37 OR #38 OR #39 OR #40 (1,883,550)
#42'case study'/exp (46,539)
#43'case report'/exp AND [embase]/lim (1,627,297)
#44'abstract report'/exp (89,710)
#45'letter'/exp (926,515)
#46#42 OR #43 OR #44 OR #45 (2,538,528)
#47#41 NOT #46 (1,819,026)
#48'animal'/exp (23,131,376)
#49'human'/exp (18,279,043)
#50#48 NOT #49 (4,852,333)
#51#47 NOT #50 (1,756,205)
#52#22 AND #51 (85)
#53#22 AND #51 AND [1‐3‐2015]/sd NOT [1‐6‐2017]/sd (32)

32 records

Database: Embase using Embase.com

Most recent update: 6 June 2017

Appendix 5. Web of Science search strategy

# 1TS = (hysteroscopy) (509)
# 2TS = (hysteroscopic surgery) (156)
# 3TS = (operative hysteroscopy) (122)
# 4TS = (synechiolysis) (8)
# 5#1 OR #2 OR #3 OR #4 (585)
# 6TS = (barrier agent)(3,157)
# 7TS =(hyaluronic acid gel)(482)
# 8TS = (intrauterine balloon)(70)
# 9TS = (amnion graft)(35)
# 10TS = (estrogen treatment) (5,460)
# 11TS = (intrauterine device) (701)
# 12TS = (antibiotics) (39,645)
# 13#6 OR #7 OR #8 OR #9 OR #10 OR #11 OR #12 (49,338)
# 14TS =(intrauterine adhesions) (125)
# 15TS =(adhesion score) (690)
# 16TS = (reproductive outcome)(4,515)
# 17#14 OR #15 OR #16 (5,293)
# 18#5 AND #13 AND #17 (28)
# 19 TS =(randomized controlled trial) (82,310)
# 20 #18 AND #19 (11)
Indexes=SCI‐EXPANDED, SSCI, A&HCI, CPCI‐S, CPCI‐SSH Timespan=2015‐2017

11 records

Database: Web of Science (WoS)

Most recent update: 6 June 2017

Appendix 6. CINAHL search strategy (EBSCOhost)

S1 TX hysteroscopy (466)
S2 TX hysteroscopic surgery (25)
S3 TX operative hysteroscopy (28)
S4 TX synechiolysis (2)
S5 S1 OR S2 OR S3 OR S4 (473)
S6 ""barrier agent"" (24,118)
S7 TX hyaluronic acid gel (26)
S8 TX intrauterine balloon (29)
S9 TX amnion graft (4)
S10 TX estrogen treatment (522)
S11 TX intrauterine device (1,577)
S12 TX antibiotics (35,078)
S13 S6 OR S7 OR S8 OR S9 OR S10 OR S11 OR S12 (37,486)
S14 TX intrauterine adhesions (15)
S15 TX adhesion score (29)
S16 TX reproductive outcome (590)
S17 S14 OR S15 OR S16 (632)
S18 S5 AND S13 AND S17 (5)
S19 (MH "Clinical Trials") (87,486)
S20 PT clinical trial* (52,906)
S21 (MH "Randomized Controlled Trials") (29,785)
S22 PT randomized controlled trial* (30,863)
S23 (MH "Random Assignment") (34,135)
S24 TX Randomi*ation (5,181)
S25 TX single blind* (8,515)
S26 TX double blind* (707,324)
S27 TX triple blind* (137)
S28 ""TX treble blind*"" (38,806)
S29 TX Placebo* (31,331)
S30 TX prospective stud* (204,534)
S31 S19 OR S20 OR S21 OR S22 OR S23 OR S24 OR S25 OR S26 OR S27 OR S28 OR S29 OR S30 (975,773)
S32 S18 AND S31 (1)

1 record

Database: CINAHL using EBSCOHOST

Most recent update: 6 June 2017

Appendix 7. Items of the pilot‐tested data extraction form

1. Source

  • Study ID.

  • Report ID.

  • Review author ID.

  • Citation and contact details.

2. Eligibility

  • Confirm eligibility for review.

  • Reason for exclusion.

3. Trial characteristics

Study design

  • Random sequence generation.

  • Participant recruitment.

  • Participant inclusion and exclusion criteria.

  • Allocation concealment.

  • Blinding of participants, personnel and outcome assessors.

  • Completeness of outcome data.

  • Selective outcome reporting.

  • Other potential sources of bias.

Follow‐up

  • Duration of follow‐up.

  • Type of follow‐up.

Size of study

  • Number of women recruited.

  • Number of women randomly assigned.

  • Number of women excluded.

  • Number of women withdrawn and lost to follow‐up.

  • Number of women analysed.

Study setting

  • Single‐ or multicentre.

  • Location.

  • Timing and duration.

Diagnostic criteria

  • Screening by transvaginal sonography (TVS).

  • Screening by hysterosalpingography (HSG).

  • Screening by TVS and HSG.

  • Screening by other ultrasound diagnostic procedures, e.g. saline infusion sonography or gel instillation sonography.

  • Screening by hysteroscopy.

  • Diagnosis confirmed by hysteroscopy and biopsy.

4. Characteristics of study participants

Baseline characteristics

  • Age.

  • Primary or secondary subfertility.

  • Duration of subfertility.

  • Diagnostic workup: baseline follicle‐stimulating hormone, semen analysis, diagnosis of tubal pathology, confirmatory test of ovulation.

  • Other contributory causes to subfertility than uterine factor.

  • Previous treatments, e.g. in vitro fertilisation (IVF), intrauterine insemination (IUI) or other treatments.

Treatment characteristics

  • IUI natural cycle.

  • IUI controlled ovarian stimulation with anti‐oestrogens or gonadotropins.

  • IVF protocol and number of embryos transferred.

  • Intracytoplasmic sperm injection protocol and number of embryos transferred.

  • Detailed description of hysteroscopic procedure.

  • Detailed description of anti‐adhesion therapy.

5. Interventions

Total number of intervention groups
Absence of other interventions in treatment and control groups

For each intervention and comparison group of interest:

  • specific intervention;

  • intervention details;

  • timing of the intervention.

6. Outcomes

Outcomes and time points reported

Definition and unit of measurement for each of the following outcomes.

Primary outcome

  • Live birth.

  • Presence of intrauterine adhesions at second‐look hysteroscopy.

Secondary outcomes

  • Pregnancy.

  • Miscarriage.

  • Mean adhesion scores at second‐look hysteroscopy.

  • Severity of adhesions at second‐look hysteroscopy.

For each outcome of interest:

  • sample size;

  • missing participants;

  • summary data for each intervention group in 2 × 2 table;

  • estimate of effect with 95% confidence interval;

  • subgroup analyses.

7. Miscellaneous

  • Funding source.

  • Key conclusions of study authors.

  • Miscellaneous comments from study authors.

  • References to other relevant studies.

  • Correspondence required.

  • Miscellaneous comments by review authors.

Study flow diagram: summary of searches since 2015. PICO: population, intervention, comparator, outcome; RCT: randomised controlled trial.
Figures and Tables -
Figure 1

Study flow diagram: summary of searches since 2015. PICO: population, intervention, comparator, outcome; RCT: randomised controlled trial.

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.
Figures and Tables -
Figure 2

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.
Figures and Tables -
Figure 3

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.

Forest plot of comparison: 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, outcome: 1.1 Live birth.
Figures and Tables -
Figure 4

Forest plot of comparison: 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, outcome: 1.1 Live birth.

Forest plot of comparison: 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, outcome: 1.4 Presence of intrauterine adhesions at second‐look hysteroscopy.
Figures and Tables -
Figure 5

Forest plot of comparison: 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, outcome: 1.4 Presence of intrauterine adhesions at second‐look hysteroscopy.

Cates' plot of numbers needed to treat for an additional beneficial outcome (NNTB) for Analysis 1.4 assuming medium risk of 545 women per 1000 with intrauterine adhesions at second‐look hysteroscopy in the control group (no treatment or placebo). Randomly compared to control, the use of device with or without hormonal treatment or hormonal treatment or barrier gels (intervention) decreased the number of women with intrauterine adhesions at second‐look hysteroscopy to 234 women per 1000 (95% confidence interval 153 to 365 women per 1000). Figure drawn using www.nntonline.net.
Figures and Tables -
Figure 6

Cates' plot of numbers needed to treat for an additional beneficial outcome (NNTB) for Analysis 1.4 assuming medium risk of 545 women per 1000 with intrauterine adhesions at second‐look hysteroscopy in the control group (no treatment or placebo). Randomly compared to control, the use of device with or without hormonal treatment or hormonal treatment or barrier gels (intervention) decreased the number of women with intrauterine adhesions at second‐look hysteroscopy to 234 women per 1000 (95% confidence interval 153 to 365 women per 1000). Figure drawn using www.nntonline.net.

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 1 Live birth.
Figures and Tables -
Analysis 1.1

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 1 Live birth.

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 2 Clinical pregnancy.
Figures and Tables -
Analysis 1.2

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 2 Clinical pregnancy.

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 3 Miscarriage.
Figures and Tables -
Analysis 1.3

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 3 Miscarriage.

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 4 Presence of intrauterine adhesions at second‐look hysteroscopy.
Figures and Tables -
Analysis 1.4

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 4 Presence of intrauterine adhesions at second‐look hysteroscopy.

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 5 Mean adhesion scores at second‐look hysteroscopy in women not treated for intrauterine adhesions.
Figures and Tables -
Analysis 1.5

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 5 Mean adhesion scores at second‐look hysteroscopy in women not treated for intrauterine adhesions.

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 6 Mean adhesion scores at second‐look hysteroscopy in women treated for intrauterine adhesions.
Figures and Tables -
Analysis 1.6

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 6 Mean adhesion scores at second‐look hysteroscopy in women treated for intrauterine adhesions.

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 7 Mild adhesions at second‐look hysteroscopy.
Figures and Tables -
Analysis 1.7

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 7 Mild adhesions at second‐look hysteroscopy.

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 8 Moderate or severe adhesions at second‐look hysteroscopy.
Figures and Tables -
Analysis 1.8

Comparison 1 Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy, Outcome 8 Moderate or severe adhesions at second‐look hysteroscopy.

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 1 Live birth.
Figures and Tables -
Analysis 2.1

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 1 Live birth.

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 2 Clinical pregnancy.
Figures and Tables -
Analysis 2.2

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 2 Clinical pregnancy.

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 3 Miscarriage.
Figures and Tables -
Analysis 2.3

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 3 Miscarriage.

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 4 Presence of intrauterine adhesions at second‐look hysteroscopy.
Figures and Tables -
Analysis 2.4

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 4 Presence of intrauterine adhesions at second‐look hysteroscopy.

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 5 Mean adhesion scores in women treated for intrauterine adhesions.
Figures and Tables -
Analysis 2.5

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 5 Mean adhesion scores in women treated for intrauterine adhesions.

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 6 Mild adhesions at second‐look hysteroscopy.
Figures and Tables -
Analysis 2.6

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 6 Mild adhesions at second‐look hysteroscopy.

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 7 Moderate or severe adhesions at second‐look hysteroscopy.
Figures and Tables -
Analysis 2.7

Comparison 2 Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy, Outcome 7 Moderate or severe adhesions at second‐look hysteroscopy.

Summary of findings for the main comparison. Any anti‐adhesion therapy versus placebo or no treatment following operative hysteroscopy

Any anti‐adhesion therapy versus placebo or no treatment following operative hysteroscopy

Patient or population: women treated by operative hysteroscopy for uterine pathology associated with subfertility or adverse pregnancy outcome

Settings: single centre, Hysteroscopy Unit or Department of Obstetrics and Gynaecology of a university or non‐university tertiary care hospital

Intervention: any anti‐adhesion therapy

Comparison: no treatment or placebo

Outcomes

Illustrative comparative risks* (95% CI)

Relative effect
(95% CI)

No of participants
(studies)

Quality of the evidence
(GRADE)

Comments

Assumed risk

Corresponding risk

No treatment or placebo

Anti‐adhesion therapy

Live birth a

No treatment or placebo

Device or hormonal treatment

OR 0.94

(0.42 to 2.12)

107
(2 RCTs)

⊕⊝⊝⊝
Very low c,d,e

Mean‐risk populationb

407 per 1000

399 per 1000
(261 to 603)

Presence of intrauterine adhesions at second‐look hysteroscopy

(second‐look hysteroscopy at 4‐12 weeks after operative hysteroscopy)

No treatment or placebo

Device ± hormonal treatment or hormonal treatment or barrier gel

OR 0.35 g (0.21 to 0.60)

560

(8 RCTs)

⊕⊕⊝⊝
Low h,i

Low‐risk populationf

0 per 1000

0 per 1000

Medium‐risk population f

545 per 1000

234 per 1000
(153 to 365)

High‐risk population f

875 per 1000

376 per 1000
(245 to 586)

*The basis for the assumed risk is provided in footnotes. The corresponding risk (and its 95% confidence interval) is based on assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
CI: confidence interval; OR: odds ratio; RCT: randomised controlled trial.

GRADE Working Group grades of evidence.
High quality: Further research is very unlikely to change our confidence in the estimate of effect.
Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
Very low quality: We are very uncertain about the estimate.

a The two included studies reported term delivery (Abu Rafea 2013) or ongoing pregnancy (Roy 2014), which we used as a surrogate outcome for live birth.

b The assumed risk for the mean‐risk population was the pooled risk of all live births in control groups of the two included studies.

c Downgraded one level for serious risk of bias: one study was at high risk of bias in several domains, including allocation concealment.

d Downgraded one level for serious imprecision; only 43 events in total.

e Downgraded one level for serious indirectness, because only 30% (35/118) of all randomised women in this analysis were subfertile.

f The assumed risk for low‐, medium‐ and high‐risk population based on presence of intrauterine adhesions following hysteroscopic removal of endometrial polyps/following removal of submucous fibroids and intrauterine adhesions (mean of both)/removal of uterine septum, respectively, based on findings of a prospective cohort study (Yang 2013).

G Two studies reported no events (Lin 2015a; Vercellini 1989).

h Downgraded one level for serious risk of bias: all eight studies had several limitations but none was at high risk for selection bias related to random sequence generation or allocation concealment.

i Downgraded one level for serious indirectness, because in four of eight studies less than 50% of participants were subfertile and in four of eight studies it was unclear whether subfertile women were included.

Figures and Tables -
Summary of findings for the main comparison. Any anti‐adhesion therapy versus placebo or no treatment following operative hysteroscopy
Summary of findings 2. Any anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy

Any anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy

Patient or population: women treated by operative hysteroscopy for uterine pathology

Settings: multicentric, Hysteroscopy Unit of Department of Obstetrics and Gynaecology of a university, university‐affiliated or non‐university tertiary care hospital

Intervention: anti‐adhesion therapy A

Comparison: anti‐adhesion therapy B

Outcomes

Illustrative comparative risks* (95% CI)

Relative effect
(95% CI)

No of participants
(studies)

Quality of the evidence
(GRADE)

Comments

Assumed risk

Corresponding risk

Anti‐adhesion therapy B

Anti‐adhesion therapy A

Live birth a

Device

Device + graft

OR 1.48

(0.57 to 3.83)

180

(3 RCTs)

⊕⊕⊝⊝

Low c,d

98 per 1000 b

138 per 1000

(60 to 315)

Presence of intrauterine adhesions at second‐look hysteroscopy

(6‐12 weeks)

Device or hormonal treatment with antibiotics

Device ± graft/gel or gel + hormonal treatment + and antibiotics

OR 0.55 (0.36 to 0.83)

451

(5 RCTs)

⊕⊕⊝⊝
Low f,g

Low‐risk population e

0 per 1000

0 per 1000

Medium‐risk population e

545 per 1000

403 per 1000
(327 to 496)

High‐risk population e

875 per 1000

647 per 1000
(525 to 796)

*The basis for the assumed risk is provided in the footnotes. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
CI: confidence interval; OR: odds ratio; RCT: randomised controlled trial.

GRADE Working Group grades of evidence.
High quality: Further research is very unlikely to change our confidence in the estimate of effect.
Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
Very low quality: We are very uncertain about the estimate.

a The three included studies reported term delivery (Wang 2016) or ongoing pregnancy (Amer 2010; Gan 2017; Wang 2016), which we used as a surrogate outcome for live birth.

b The assumed risk for the average‐risk population is the pooled risk of all the live births in the control groups of the three included studies.

c Downgraded one level for serious risk of bias: despite several limitations none of the studies was at high risk for selection bias related to random sequence generation or allocation concealment.

d Downgraded one level for serious imprecision‐ only 21 events in total.

e The assumed risk for low/medium/high‐risk population is based on the presence of intrauterine adhesions following hysteroscopic removal of endometrial polyps/following removal of submucous fibroids and IUAs (mean of both)/removal of uterine septum, respectively, based on findings of a prospective cohort study (Yang 2013).

f Downgraded one level for serious risk of bias: despite several limitations none of the studies was at high risk for selection bias related to random sequence generation or allocation concealment.

g Downgraded one level for serious indirectness because, in two of five studies, less than 50% of participants were subfertile; in one of five studies, it was unclear if subfertile women were included and in two of five studies, the proportion of infertile women was not reported.

Figures and Tables -
Summary of findings 2. Any anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy
Table 1. Median American Fertility Society (AFS) scores Lin 2015b

Outcome

Balloon group

(intervention: n = 82)

IUD group

(control: n = 80)

P value

AFS score before surgery (median, 95% CI)

8 (5 to 12)

8 (5 to 12)

1.00

Median reduction in AFS score

7 (2 to 12)

7 (0 to 12)

1.00

IUD: intrauterine device; n: number of participants.

Figures and Tables -
Table 1. Median American Fertility Society (AFS) scores Lin 2015b
Table 2. Median American Fertility Society (AFS) scores Amer 2010

Statistic

Fresh amnion graft (group 2: n = 14)

Dried amnion graft (group 3: n = 15)

No amnion graft (group 1: n = 14)

P value

Median

1.5

2

2

IQR

1 to 2

1 to 2

1 to 2

0.27

IQR: interquartile range; n: number of participants.

Figures and Tables -
Table 2. Median American Fertility Society (AFS) scores Amer 2010
Table 3. Median American Fertility Society (AFS) scores Gan 2017

Statistic

Amnion graft

(intervention: n = 40)

No graft

(control: n = 40)

P value

Median

2

4

IQR

2 to 5

2 to 6

0.03

IQR: interquartile range; n: number of participants.

Figures and Tables -
Table 3. Median American Fertility Society (AFS) scores Gan 2017
Comparison 1. Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Live birth Show forest plot

2

107

Odds Ratio (M‐H, Fixed, 95% CI)

0.94 [0.42, 2.12]

1.1 Device vs no tx

1

24

Odds Ratio (M‐H, Fixed, 95% CI)

1.0 [0.18, 5.46]

1.2 Hormonal tx vs placebo/no tx

1

83

Odds Ratio (M‐H, Fixed, 95% CI)

0.93 [0.37, 2.33]

2 Clinical pregnancy Show forest plot

2

107

Odds Ratio (M‐H, Fixed, 95% CI)

0.86 [0.37, 2.01]

2.1 Device vs no tx

1

24

Odds Ratio (M‐H, Fixed, 95% CI)

1.0 [0.06, 18.08]

2.2 Hormonal tx vs placebo

1

83

Odds Ratio (M‐H, Fixed, 95% CI)

0.85 [0.35, 2.06]

3 Miscarriage Show forest plot

2

54

Odds Ratio (M‐H, Fixed, 95% CI)

0.68 [0.18, 2.57]

3.1 Device vs no tx

1

22

Odds Ratio (M‐H, Fixed, 95% CI)

0.66 [0.11, 4.00]

3.2 Hormonal tx vs placebo

1

32

Odds Ratio (M‐H, Fixed, 95% CI)

0.72 [0.10, 5.01]

4 Presence of intrauterine adhesions at second‐look hysteroscopy Show forest plot

8

560

Odds Ratio (M‐H, Fixed, 95% CI)

0.35 [0.21, 0.60]

4.1 Device vs no tx

1

60

Odds Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

4.2 Device + hormonal tx vs placebo/no tx

1

11

Odds Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

4.3 Hormonal tx vs placebo

1

85

Odds Ratio (M‐H, Fixed, 95% CI)

0.14 [0.01, 2.72]

4.4 Gel vs no tx

5

404

Odds Ratio (M‐H, Fixed, 95% CI)

0.37 [0.21, 0.64]

5 Mean adhesion scores at second‐look hysteroscopy in women not treated for intrauterine adhesions Show forest plot

1

132

Mean Difference (IV, Fixed, 95% CI)

‐1.46 [‐1.64, ‐1.29]

5.1 Gel vs no tx

1

132

Mean Difference (IV, Fixed, 95% CI)

‐1.46 [‐1.64, ‐1.29]

6 Mean adhesion scores at second‐look hysteroscopy in women treated for intrauterine adhesions Show forest plot

1

84

Mean Difference (IV, Fixed, 95% CI)

‐3.3 [‐3.37, ‐3.23]

6.1 Gel vs no tx

1

84

Mean Difference (IV, Fixed, 95% CI)

‐3.3 [‐3.37, ‐3.23]

7 Mild adhesions at second‐look hysteroscopy Show forest plot

6

494

Odds Ratio (M‐H, Fixed, 95% CI)

1.33 [0.68, 2.61]

7.1 Hormonal tx vs placebo/no tx

1

90

Odds Ratio (M‐H, Fixed, 95% CI)

0.19 [0.01, 4.10]

7.2 Gel vs no tx

5

404

Odds Ratio (M‐H, Fixed, 95% CI)

1.56 [0.77, 3.18]

8 Moderate or severe adhesions at second‐look hysteroscopy Show forest plot

6

494

Odds Ratio (M‐H, Fixed, 95% CI)

0.08 [0.03, 0.24]

8.1 Hormonal tx vs placebo/no tx

1

90

Odds Ratio (M‐H, Fixed, 95% CI)

0.33 [0.01, 8.22]

8.2 Gel vs placebo/no tx

5

404

Odds Ratio (M‐H, Fixed, 95% CI)

0.07 [0.02, 0.23]

Figures and Tables -
Comparison 1. Anti‐adhesion therapy versus placebo or no treatment (tx) following operative hysteroscopy
Comparison 2. Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Live birth Show forest plot

3

180

Odds Ratio (M‐H, Fixed, 95% CI)

1.48 [0.57, 3.83]

1.1 Device + graft vs device

3

180

Odds Ratio (M‐H, Fixed, 95% CI)

1.48 [0.57, 3.83]

2 Clinical pregnancy Show forest plot

4

221

Odds Ratio (M‐H, Fixed, 95% CI)

1.72 [0.89, 3.33]

2.1 Device + graft vs device

3

180

Odds Ratio (M‐H, Fixed, 95% CI)

1.53 [0.74, 3.18]

2.2 Gel + hormone tx (HT) + antibiotics vs HT + antibiotics

1

41

Odds Ratio (M‐H, Fixed, 95% CI)

2.83 [0.62, 13.04]

3 Miscarriage Show forest plot

3

40

Odds Ratio (M‐H, Fixed, 95% CI)

0.80 [0.20, 3.19]

3.1 Device + graft vs device

3

40

Odds Ratio (M‐H, Fixed, 95% CI)

0.80 [0.20, 3.19]

4 Presence of intrauterine adhesions at second‐look hysteroscopy Show forest plot

5

451

Odds Ratio (M‐H, Fixed, 95% CI)

0.55 [0.36, 0.83]

4.1 Device vs device

1

162

Odds Ratio (M‐H, Fixed, 95% CI)

0.81 [0.42, 1.57]

4.2 Device + graft vs device

2

137

Odds Ratio (M‐H, Fixed, 95% CI)

0.53 [0.25, 1.10]

4.3 Device + gel vs device

1

111

Odds Ratio (M‐H, Fixed, 95% CI)

0.31 [0.13, 0.76]

4.4 Gel + HT + antibiotics vs HT + antibiotics

1

41

Odds Ratio (M‐H, Fixed, 95% CI)

0.28 [0.03, 2.98]

5 Mean adhesion scores in women treated for intrauterine adhesions Show forest plot

3

Mean Difference (IV, Random, 95% CI)

Subtotals only

5.1 Device vs device

1

162

Mean Difference (IV, Random, 95% CI)

0.0 [‐0.68, 0.68]

5.2 Device + graft vs device

1

57

Mean Difference (IV, Random, 95% CI)

‐3.10 [‐4.17, ‐2.03]

5.3 Device + gel vs device

1

111

Mean Difference (IV, Random, 95% CI)

‐1.6 [‐2.32, ‐0.88]

6 Mild adhesions at second‐look hysteroscopy Show forest plot

1

111

Odds Ratio (M‐H, Fixed, 95% CI)

1.11 [0.53, 2.34]

6.1 Device + gel vs device

1

111

Odds Ratio (M‐H, Fixed, 95% CI)

1.11 [0.53, 2.34]

7 Moderate or severe adhesions at second‐look hysteroscopy Show forest plot

2

152

Odds Ratio (M‐H, Fixed, 95% CI)

0.25 [0.10, 0.61]

7.1 Device + gel vs device

1

111

Odds Ratio (M‐H, Fixed, 95% CI)

0.24 [0.09, 0.63]

7.2 Gel + HT + antibiotics vs HT + antibiotics

1

41

Odds Ratio (M‐H, Fixed, 95% CI)

0.28 [0.03, 2.98]

Figures and Tables -
Comparison 2. Anti‐adhesion therapy A versus anti‐adhesion therapy B following operative hysteroscopy