Primidone AND Phenobarbital (Epilepsy) updated on 04-22-2025

Small for gestational age (weight)

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.
S16816
R70550
Christensen (Phenobarbital) (Epilepsy) (Controls exposed to LTG), 2024 Small for gestational age (a z-score for birth weight ≤10th percentile for gestational week, sex, and country (including newborns with congenital malformations)) during pregnancy (anytime or not specified) population based cohort retrospective exposed to other treatment, sick excluded Adjustment: No 1.52 [0.68;3.42] C
excluded (control group)
7/47   546/5,299 553 47
ref
S16817
R70551
Christensen (Phenobarbital) (Epilepsy) (Controls unexposed, general population), 2024 Small for gestational age (a z-score for birth weight ≤10th percentile for gestational week, sex, and country (including newborns with congenital malformations)) during pregnancy (anytime or not specified) population based cohort retrospective unexposed, sick Adjustment: Yes 1.51 [0.67;3.43] 7/47   2,416/22,227 2,423 47
ref
S8704
R29342
Coste (Phenobarbital) (Controls exposed to Lamotrigine, sick), 2020 Small for gestational age (weight) during pregnancy (anytime or not specified) retrospective cohort (claims database) exposed to other treatment, sick excluded Adjustment: No Controls: mixed indications 2.26 [1.31;3.90] C
excluded (control group)
17/84   284/2,813 301 84
ref
S8705
R29360
Coste (Phenobarbital) (Controls unexposed, NOS), 2020 Small for gestational age (weight) during pregnancy (anytime or not specified) retrospective cohort (claims database) unexposed (general population or NOS) Adjustment: No 2.34 [1.37;3.98] C 17/84   167,376/1,710,441 167,393 84
ref
S8703
R29334
Hernández-Díaz (Phenobarbital), 2017 Small for gestational age (<10th percentile) throughout pregnancy prospective cohort exposed to other treatment, sick Adjustment: Yes 2.40 [1.60;3.60] -/178   -/1,799 - 178
ref
S8648
R29032
Burja (Phenobarbital or Primidone) (Controls unexposed, disease free), 2006 Small for date (NOS) during pregnancy (anytime or not specified) retrospective cohort (registry) unexposed, disease free excluded Adjustment: No 8.17 [0.49;135.15] C
excluded (control group)
1/2   23/211 24 2
ref
S8649
R29037
Burja (Phenobarbital or Primidone) (Controls unexposed, sick), 2006 Small for date (NOS) during pregnancy (anytime or not specified) retrospective cohort (registry) unexposed, sick Adjustment: No 31.00 [1.02;941.06] C 1/2   1/32 2 2
ref
S8653
R29117
Endo (Phenobarbital) (Controls unexposed, disease free), 2004 Intrauterine growth retardation (NOS) throughout pregnancy retrospective cohort unexposed, disease free excluded Adjustment: No 0.95 [0.05;16.63] C
excluded (control group)
0/10   34/656 34 10
ref
S8654
R29132
Endo (Phenobarbital) (Controls unexposed, sick), 2004 Intrauterine growth retardation (NOS) throughout pregnancy retrospective cohort unexposed, sick Adjustment: No 0.05 [0.00;6.68] C 0/10   0/1 0 10
ref
Total 5 studies 2.19 [1.44;3.35] 169,818 321
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 Christensen (Phenobarbital) (Epilepsy) (Controls unexposed, general population), 2024Christensen, 2024 1 1.51[0.67; 3.43]2,4234720%ROB confusion: seriousROB selection: lowROB classification: criticalROB missing: lowROB mesure: moderateROB reporting: moderate Coste (Phenobarbital) (Controls unexposed, NOS), 2020Coste, 2020 2 2.34[1.37; 3.98]167,3938434%ROB confusion: NAROB selection: NAROB classification: NAROB missing: NAROB mesure: NAROB reporting: NA Hernández-Díaz (Phenobarbital), 2017Hernández-Díaz, 2017 3 2.40[1.60; 3.60]-17844%ROB confusion: NAROB selection: NAROB classification: NAROB missing: NAROB mesure: NAROB reporting: NA Burja (Phenobarbital or Primidone) (Controls unexposed, sick), 2006Burja, 2006 4 31.00[1.02; 941.06]222%ROB confusion: NAROB selection: NAROB classification: NAROB missing: NAROB mesure: NAROB reporting: NA Endo (Phenobarbital) (Controls unexposed, sick), 2004Endo, 2004 5 0.05[0.00; 6.68]0101%ROB confusion: NAROB selection: NAROB classification: NAROB missing: NAROB mesure: NAROB reporting: NA Total (5 studies) I2 = 29% 2.19[1.44; 3.35]169,8183210.0100.01.0ROB: A: confusion, B: selection, C: classification, D: missing, E: measurement, F: reportinglow,moderate,serious,critical,unclear,

1: Phenobarbital) (Epilepsy) (Controls unexposed, general population; 2: Phenobarbital) (Controls unexposed, NOS; 3: Phenobarbital; 4: Phenobarbital or Primidone) (Controls unexposed, sick; 5: Phenobarbital) (Controls unexposed, sick;

Sensitivity analysis

SubsetTE95% CIn casesn exposedkI2 Type of studies cohort studiescohort studies 2.19[1.44; 3.35]169,81832129%NAChristensen (Phenobarbital) (Epilepsy) (Controls unexposed, general population), 2024 Coste (Phenobarbital) (Controls unexposed, NOS), 2020 Hernández-Díaz (Phenobarbital), 2017 Burja (Phenobarbital or Primidone) (Controls unexposed, sick), 2006 Endo (Phenobarbital) (Controls unexposed, sick), 2004 5 case control studiescase control studies 0 Type of controls unexposed (disease free or unspecified)unexposed (disease free or unspecified) 2.34[1.37; 3.98]167,39384 -NACoste (Phenobarbital) (Controls unexposed, NOS), 2020 1 unexposed, sickunexposed, sick 1.89[0.15; 24.53]2,4255959%NAChristensen (Phenobarbital) (Epilepsy) (Controls unexposed, general population), 2024 Burja (Phenobarbital or Primidone) (Controls unexposed, sick), 2006 Endo (Phenobarbital) (Controls unexposed, sick), 2004 3 exposed to other treatment, sickexposed to other treatment, sick 2.40[1.60; 3.60]-178 -NAHernández-Díaz (Phenobarbital), 2017 1 Tags Adjustment   - No  - No 2.42[0.21; 27.21]167,3959656%NACoste (Phenobarbital) (Controls unexposed, NOS), 2020 Burja (Phenobarbital or Primidone) (Controls unexposed, sick), 2006 Endo (Phenobarbital) (Controls unexposed, sick), 2004 3   - Yes  - Yes 2.19[1.52; 3.15]2,4232250%NAChristensen (Phenobarbital) (Epilepsy) (Controls unexposed, general population), 2024 Hernández-Díaz (Phenobarbital), 2017 2 All studiesAll studies 2.19[1.44; 3.35]169,81832129%NAChristensen (Phenobarbital) (Epilepsy) (Controls unexposed, general population), 2024 Coste (Phenobarbital) (Controls unexposed, NOS), 2020 Hernández-Díaz (Phenobarbital), 2017 Burja (Phenobarbital or Primidone) (Controls unexposed, sick), 2006 Endo (Phenobarbital) (Controls unexposed, sick), 2004 50.0100.01.0

Publication bias and p-hacking diagnosis

funnel plot
0.0-5.86.62.9650.000Christensen (Phenobarbital) (Epilepsy) (Controls unexposed, general population), 2024Coste (Phenobarbital) (Controls unexposed, NOS), 2020Hernández-Díaz (Phenobarbital), 2017Burja (Phenobarbital or Primidone) (Controls unexposed, sick), 2006Endo (Phenobarbital) (Controls unexposed, sick), 2004

Asymetry test p-value = 0.7913 (by Egger's regression)

slope=0.8925 (0.3498); intercept=-0.2972 (1.0279); t=0.2892; p=0.7913

p values plot
0.01.00.01.0

Sub-groups analysis using all included studies

excluded 8653, 8648, 8704, 16816

Sub-groupsTE95% CIn casesn exposedkI2ROB type of controls unexposed controls (disease free or unspecified)unexposed controls (disease free or unspecified) 2.37[1.42; 3.96]167,451960%NACoste (Phenobarbital) (Controls unexposed, NOS), 2020 Burja (Phenobarbital or Primidone) (Controls unexposed, disease free), 2006 Endo (Phenobarbital) (Controls unexposed, disease free), 2004 3 unexposed, sick controlsunexposed, sick controls 1.89[0.15; 24.53]2,4255959%NAChristensen (Phenobarbital) (Epilepsy) (Controls unexposed, general population), 2024 Burja (Phenobarbital or Primidone) (Controls unexposed, sick), 2006 Endo (Phenobarbital) (Controls unexposed, sick), 2004 3 exposed to other treatment, sick controlsexposed to other treatment, sick controls 2.21[1.63; 2.99]8543090%NAChristensen (Phenobarbital) (Epilepsy) (Controls exposed to LTG), 2024 Coste (Phenobarbital) (Controls exposed to Lamotrigine, sick), 2020 Hernández-Díaz (Phenobarbital), 2017 30.510.01.0