Valproate (All indications) updated on 04-22-2025

Postpartum hemorrhage

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.
S18706
R79588
Mazzone (Valproate) (Controls exposed to LTG) (Mixed indications), 2025 Postpartum hemorrhage during pregnancy (anytime or not specified) population based cohort retrospective exposed to other treatment, sick excluded Adjustment: No 0.73 [0.56;0.95] C
excluded (control group)
86/315   500/1,469 586 315
ref
S18708
R79604
Mazzone (Valproate) (Controls unexposed, NOS) (Mixed indications), 2025 Postpartum hemorrhage during pregnancy (anytime or not specified) population based cohort retrospective unexposed (general population or NOS) Adjustment: Yes 0.68 [0.48;0.96] 86/315   203,226/624,794 203,312 315
ref
S9432
R33127
Borthen (Valproate) (Controls exposed to Lamotrigine, sick), 2010 Haemorrhage ≥ 500 ml during pregnancy (anytime or not specified) population based cohort retrospective exposed to other treatment, sick excluded Adjustment: No 0.96 [0.61;1.53] C
excluded (control group)
43/215   48/233 91 215
ref
S9434
R33135
Borthen (Valproate) (Controls unexposed, disease free), 2010 Haemorrhage ≥ 500 ml during pregnancy (anytime or not specified) population based cohort retrospective unexposed, disease free excluded Adjustment: Yes 2.10 [1.50;3.00]
excluded (control group)
43/215   49,252/362,302 49,295 215
ref
S9436
R33143
Borthen (Valproate) (Controls unexposed, sick), 2010 Haemorrhage ≥ 500 ml during pregnancy (anytime or not specified) population based cohort retrospective unexposed, sick Adjustment: No 1.44 [1.01;2.06] C 43/215   276/1,863 319 215
ref
Total 2 studies 0.99 [0.47;2.06] 203,631 530
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 Mazzone (Valproate) (Controls unexposed, NOS) (Mixed indications), 2025Mazzone, 2025 1 0.68[0.48; 0.96]203,31231550%ROB confusion: seriousROB selection: lowROB classification: criticalROB missing: unclearROB mesure: moderateROB reporting: moderate Borthen (Valproate) (Controls unexposed, sick), 2010Borthen, 2010 2 1.44[1.01; 2.06]31921550%ROB confusion: criticalROB selection: lowROB classification: moderateROB missing: unclearROB mesure: moderateROB reporting: moderate Total (2 studies) I2 = 88% 0.99[0.47; 2.06]203,6315300.25.01.0ROB: A: confusion, B: selection, C: classification, D: missing, E: measurement, F: reportinglow,moderate,serious,critical,unclear,

1: Valproate) (Controls unexposed, NOS) (Mixed indications; 2: Valproate) (Controls unexposed, sick;

Sensitivity analysis

SubsetTE95% CIn casesn exposedkI2 Type of studies cohort studiescohort studies 0.99[0.47; 2.06]203,63153088%NAMazzone (Valproate) (Controls unexposed, NOS) (Mixed indications), 2025 Borthen (Valproate) (Controls unexposed, sick), 2010 2 case control studiescase control studies 0 Type of controls unexposed (disease free or unspecified)unexposed (disease free or unspecified) 0.68[0.48; 0.96]203,312315 -NAMazzone (Valproate) (Controls unexposed, NOS) (Mixed indications), 2025 1 unexposed, sickunexposed, sick 1.44[1.01; 2.06]319215 -NABorthen (Valproate) (Controls unexposed, sick), 2010 1 Tags Adjustment   - No  - No 1.44[1.01; 2.06]319215 -NABorthen (Valproate) (Controls unexposed, sick), 2010 1   - Yes  - Yes 0.68[0.48; 0.96]203,312315 -NAMazzone (Valproate) (Controls unexposed, NOS) (Mixed indications), 2025 1 All studiesAll studies 0.99[0.47; 2.06]203,63153088%NAMazzone (Valproate) (Controls unexposed, NOS) (Mixed indications), 2025 Borthen (Valproate) (Controls unexposed, sick), 2010 20.25.01.0

Publication bias and p-hacking diagnosis

funnel plot

Funnel plot not drawn. Less than 3 points.

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

not enought points

p values plot

Funnel plot not drawn. Less than 3 points.

Sub-groups analysis using all included studies

excluded 9432, 9434, 18706

Sub-groupsTE95% CIn casesn exposedkI2ROB type of controls unexposed controls (disease free or unspecified)unexposed controls (disease free or unspecified) 1.19[0.40; 3.61]252,60753095%NAMazzone (Valproate) (Controls unexposed, NOS) (Mixed indications), 2025 Borthen (Valproate) (Controls unexposed, disease free), 2010 2 unexposed, sick controlsunexposed, sick controls 1.44[1.01; 2.06]319215 -NABorthen (Valproate) (Controls unexposed, sick), 2010 1 exposed to other treatment, sick controlsexposed to other treatment, sick controls 0.78[0.62; 1.00]6775306%NAMazzone (Valproate) (Controls exposed to LTG) (Mixed indications), 2025 Borthen (Valproate) (Controls exposed to Lamotrigine, sick), 2010 20.510.01.0