Copyright ©The Author(s) 2022.
World J Methodol. May 20, 2022; 12(3): 164-178
Published online May 20, 2022. doi: 10.5662/wjm.v12.i3.164
Figure 1
Figure 1 Preferred Reporting Items for Systematic Review and Meta-Analysis flow chart. Citation: Page MJ, McKenzie JE, Bossuyt PM, Boutron I, Hoffmann TC, Mulrow CD, Shamseer L, Tetzlaff JM, Akl EA, Brennan SE, Chou R, Glanville J, Grimshaw JM, Hróbjartsson A, Lalu MM, Li T, Loder EW, Mayo-Wilson E, McDonald S, McGuinness LA, Stewart LA, Thomas J, Tricco AC, Welch VA, Whiting P, Moher D. The PRISMA 2020 statement: an updated guideline for reporting systematic reviews. BMJ 2021; 372: n71. For more information, visit:
Figure 2
Figure 2 Forest plot showing the overall weighted prevalence of post-randomization participant attrition from vitamin D supplementation trials in gestational diabetes mellitus patients. The diamond centers on the summary of the prevalence estimate, and the width indicates the corresponding 95% confidence interval. Articles with identical author names and years are suffixed with alphabets: Asemi et al[31], 2014, Asemi et al[16], 2014. CI: Confidence interval; ES: Effect size.
Figure 3
Figure 3 Forest plot (pairwise meta-analysis; random-effect model) comparing missing outcome data between vitamin D recipients and non-recipients. Articles with identical author names and years are suffixed with alphabets: Asemi, 2014a[31], Asemi, 2014b[16].
Figure 4
Figure 4 Funnel plot for pairwise meta-analysis. Outcome: Post-randomization participant attrition from vitamin D-supplemented treatment arm/s.
Figure 5
Figure 5 Network map. A: Outcome: Newborn hyperbilirubinemia; B: Outcome: Newborn hospitalization; C: Outcome: Macrosomia; D: Outcome: Cesarean section; E: Outcome: Fasting plasma glucose. Interventions in the model: Placebo, probiotic, omega-3 fatty acids (omega), magnesium-zinc-calcium and vitamin D (mgzncavd), vitamin D and probiotic (vitdprobiotic), vitamin D and omega-3 fatty acids (vitdomega), vitamin D and calcium (vitdca), and vitamin D (vitd).