Statistical analysis
Continuous variables were expressed as median, interquartile range (IQR) and range (min-max) and categorical variables as proportions [n(%)].
For the main perinatal outcomes [gestational age at delivery, prematurity rate (<37 weeks), birthweight, birthweight centile, SGA (birthweight centile<10th(17)), caesarean section rate, fetal distress requiring emergent delivery and need to neonatal unit admission] one-sample non-parametric tests were performed to compare the observed medians (Wilconox signed-rank test) or proportions (chi-squared test) against the expected values as observed in an historical cohort of deliveries attended in the same institution between March 13th and April 25th, 2019.
Statistically significant differences were considered if p<0.05. Data was analyzed using R studio version 1.1.442.