The mean BPF values of the study populations plotted individually for each post-processing method.

<p>Mean BPF value of each study population (vertical axis) is plotted against mean age (horizontal axis). Individual mixed weighted regression lines are plotted for each post-processing method. Twelve studies were excluded from this figure (see the sections on statistics and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0170018#sec007" target="_blank">results</a>). BPF = Brain Parenchymal Fraction. SIENAX = Structural Image Evaluation Using Normalisation of Atrophy Cross-Sectional. SPM = Statistical Parametric Mapping. VBM = Voxel Based Morphometry.</p

All the studies included in the review.

<p>The individual studies included in the review, subgrouped when applicable. The age and BPF are mean values of the study population.</p

The mean BPF values of the study populations plotted in relation to age.

<p>Mean BPF value of each study population (vertical axis) is plotted against mean age (horizontal axis). The regression line is a mixed weighted regression model. The dashed lines represent 95% confidence interval. Seventeen studies were excluded from this figure (see the sections on statistics and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0170018#sec007" target="_blank">results</a>). BPF = Brain Parenchymal Fraction. SIENAX = Structural Image Evaluation Using Normalisation of Atrophy Cross-Sectional. SPM = Statistical Parametric Mapping. VBM = Voxel Based Morphometry.</p

Singleton birth weight (grams; g) in relation to maternal height for all women, for women born in Sweden (S) and for women born outside Sweden (OS) for specified outcomes.

<p>Adjusted odds ratio and 95% confidence interval for risk of caesarean section<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198124#t006fn001" target="_blank">¹</a> (CS).</p

Predicted probability of CS for the panels of specific age in years (20, 30, 40), specific BMI (20, 25, 30), birth weight less than 4500 g or 4500 g or more, and parity represented by the categories primiparity and multiparity.

<p>Predicted probability of CS for the panels of specific age in years (20, 30, 40), specific BMI (20, 25, 30), birth weight less than 4500 g or 4500 g or more, and parity represented by the categories primiparity and multiparity.</p

Frequencies of underweight, normal weight, overweight and obesity in relation to specified maternal heights categories.

<p>Frequencies of underweight, normal weight, overweight and obesity in relation to specified maternal heights categories.</p

Frequency of caesarean sections (CS) total, elective CS and emergency CS for specified maternal height categories.

<p>Frequency of caesarean sections (CS) total, elective CS and emergency CS for specified maternal height categories.</p

Background characteristics of women with singleton pregnancies (N = 581,844) and by maternal country of birth groups^a^,^b.

<p>Background characteristics of women with singleton pregnancies (N = 581,844) and by maternal country of birth groups<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198124#t001fn001" target="_blank">^a</a>^,<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198124#t001fn002" target="_blank">^b</a>.</p

Crude odds ratios (COR) and their 95% confidence intervals (95% CI) for caesarean section (CS) in relation to vaginal delivery in logistic regression analyses for specified categories.

<p>Crude odds ratios (COR) and their 95% confidence intervals (95% CI) for caesarean section (CS) in relation to vaginal delivery in logistic regression analyses for specified categories.</p

Predicted probability of CS for the panels of specific age in years (20, 30, 40), specific BMI (20, 25, 30), birth weight less than 4500 g or 4500 g or more, and country of birth represented by the categories born in Sweden and born outside Sweden.

<p>Predicted probability of CS for the panels of specific age in years (20, 30, 40), specific BMI (20, 25, 30), birth weight less than 4500 g or 4500 g or more, and country of birth represented by the categories born in Sweden and born outside Sweden.</p