Methotrexate (Pre-conception only)

All congenital malformations (majors, minors, majors and minors, or unspecified)

R analysis
id Study   Lib. in paper Exposition period    Study type  Control type 
 
Tags OR 95%CI x1/n1 x0/n0 no cases no exposed ROB Ref.
S10377
R38128
Howren, 2020 Congenital anomalies preconceptional for kinetic reason retrospective cohort unexposed, sick Adjustment: Yes Exposed group: MTX (polytherapy or not specified) Indications: Inflammatory diseases MTX less than 3 months before pregnancy 1.12 [0.15;8.59] -/-   -/6,064 - -
ref
S6697
R41699
Svirsky, 2017 Serious birth malformation preconceptional for kinetic reason retrospective cohort unexposed, sick Adjustment: No Exposed group: MTX (monotherapy) MTX more than 3 months before pregnancy MTX treatment for ectopic pregnancy 1.19 [0.07;19.35] C 1/89   1/106 2 89
ref
S10348
R41700
Weber-Schoendorfer (Controls exposed to other treatment, sick), 2014 Major birth defects preconceptional for kinetic reason prospective cohort exposed to other treatment, sick excluded Adjustment: Yes Exposed group: MTX (polytherapy or not specified) Indications: Inflammatory diseases Matched MTX less than 3 months before pregnancy 1.10 [0.30;4.20]
excluded (control group)
4/114   14/393 18 114
ref
S10349
R41701
Weber-Schoendorfer (Controls unexposed, disease free), 2014 Major birth defects preconceptional for kinetic reason prospective cohort unexposed, disease free Adjustment: Yes Exposed group: MTX (polytherapy or not specified) Indications: Inflammatory diseases Matched MTX less than 3 months before pregnancy 1.60 [0.40;7.30] 4/114   29/1,001 33 114
ref
S7264
R27104
Matsui, 2003 Major and minor congenital anomalies preconceptional for kinetic reason retrospective cohort unexposed, sick Adjustment: No Exposed group: MTX (polytherapy or not specified) Indication: Gestational Trophoblastic Tumor (GTT) MTX more than 3 months before pregnancy 10.81 [0.37;315.20] C 0/4   1/115 1 4
ref
Total 4 studies 1.68 [0.60;4.71] 36 207
x1: number of endpoints among exposed, n1: number of exposed; x0: number of endpoints among non exposed, n0: number of non exposed; C: calculated odds ratio from numbers of events and effectives

Forest plot

StudyTE95% CIn casesn exposedweightROBABCDEF Howren, 2020Howren, 2020 1.12[0.15; 8.59]--26%ROB confusion: seriousROB selection: moderateROB classification: criticalROB missing: lowROB mesure: moderateROB reporting: moderate Svirsky, 2017Svirsky, 2017 1.19[0.07; 19.35]28914%ROB confusion: criticalROB selection: criticalROB classification: moderateROB missing: lowROB mesure: moderateROB reporting: moderate Weber-Schoendorfer (Controls unexposed, disease free), 2014Weber-Schoendorfer, 2014 1 1.60[0.40; 7.30]3311451%ROB confusion: criticalROB selection: moderateROB classification: criticalROB missing: lowROB mesure: criticalROB reporting: moderate Matsui, 2003Matsui, 2003 10.81[0.37; 315.20]149%ROB confusion: criticalROB selection: criticalROB classification: moderateROB missing: lowROB mesure: unclearROB reporting: moderate Total (4 studies) I2 = 0% 1.68[0.60; 4.71]362070.550.01.0ROB: A: confusion, B: selection, C: classification, D: missing, E: measurement, F: reportinglow,moderate,serious,critical,unclear,

1: Controls unexposed, disease free;

Sensitivity analysis

SubsetTE95% CIn casesn exposedkI2 Type of studies cohort studiescohort studies 1.68[0.60; 4.71]362070%NAHowren, 2020 Svirsky, 2017 Weber-Schoendorfer (Controls unexposed, disease free), 2014 Matsui, 2003 4 case control studiescase control studies 0 Type of controls unexposed (disease free or unspecified)unexposed (disease free or unspecified) 1.60[0.37; 6.84]33114 -NAWeber-Schoendorfer (Controls unexposed, disease free), 2014 1 unexposed, sickunexposed, sick 1.76[0.40; 7.66]3930%NAHowren, 2020 Svirsky, 2017 Matsui, 2003 3 Tags Adjustment   - No  - No 2.92[0.34; 24.99]3930%NASvirsky, 2017 Matsui, 2003 2   - Yes  - Yes 1.42[0.44; 4.61]331140%NAHowren, 2020 Weber-Schoendorfer (Controls unexposed, disease free), 2014 2 Exposed group   - MTX (monotherapy)  - MTX (monotherapy) 1.19[0.07; 19.35]289 -NASvirsky, 2017 1   - MTX (polytherapy or not specified)  - MTX (polytherapy or not specified) 1.77[0.58; 5.39]341180%NAHowren, 2020 Weber-Schoendorfer (Controls unexposed, disease free), 2014 Matsui, 2003 3 Indication   - Gestational Trophoblastic Tumor (GTT)  - Gestational Trophoblastic Tumor (GTT) 10.81[0.37; 315.20]14 -NAMatsui, 2003 1 Indications   - Inflammatory diseases  - Inflammatory diseases 1.42[0.44; 4.61]331140%NAHowren, 2020 Weber-Schoendorfer (Controls unexposed, disease free), 2014 2 MatchedMatched 1.60[0.37; 6.84]33114 -NAWeber-Schoendorfer (Controls unexposed, disease free), 2014 1 MTX less than 3 months before pregnancyMTX less than 3 months before pregnancy 1.42[0.44; 4.61]331140%NAHowren, 2020 Weber-Schoendorfer (Controls unexposed, disease free), 2014 2 MTX more than 3 months before pregnancyMTX more than 3 months before pregnancy 2.92[0.34; 24.99]3930%NASvirsky, 2017 Matsui, 2003 2 MTX treatment for ectopic pregnancyMTX treatment for ectopic pregnancy 1.19[0.07; 19.35]289 -NASvirsky, 2017 1 All studiesAll studies 1.68[0.60; 4.71]362070%NAHowren, 2020 Svirsky, 2017 Weber-Schoendorfer (Controls unexposed, disease free), 2014 Matsui, 2003 40.550.01.0

Publication bias and p-hacking diagnosis

funnel plot
0.0-4.04.62.0650.000Howren, 2020Svirsky, 2017Weber-Schoendorfer (Controls unexposed, disease free), 2014Matsui, 2003

Asymetry test p-value = NaN (by Egger's regression)

not enought points

p values plot
0.01.00.01.0

Sub-groups analysis using all included studies

excluded 10348

Sub-groupsTE95% CIn casesn exposedkI2ROB type of controls unexposed controls (disease free or unspecified)unexposed controls (disease free or unspecified) 1.25[0.42; 3.71]27,6561210%NADawson, 2014 Weber-Schoendorfer (Controls unexposed, disease free), 2014 2 unexposed, sick controlsunexposed, sick controls 1.76[0.40; 7.66]3930%NAHowren, 2020 Svirsky, 2017 Matsui, 2003 3 exposed to other treatment, sick controlsexposed to other treatment, sick controls 1.10[0.29; 4.12]18114 -NAWeber-Schoendorfer (Controls exposed to other treatment, sick), 2014 10.510.01.0