Impact of the COVID-19 lockdown on the O'Sullivan test and gestational diabetes mellitus diagnosis in pregnant Spanish women

Objective: To analyze the impact of COVID-19 lockdown on serum glucose levels of pregnant women. Design: A retrospective analysis of O'Sullivan test in pregnant women who underwent COVID-19 lockdown compared to controls. Site: Poniente Primary Health Care center in C & oacute;rdoba (Spain). Participants: 235 pregnant women from 23+0 to 25+0 weeks of gestation without diabetes mellitus. Interventions: Gestational diabetes mellitus screening with O'Sullivan test and 3-h oral glucose tolerance test. Main measurements: Pregnant women who underwent gestational diabetes mellitus screening with O'Sullivan test before (control group) and during COVID-19 Lockdown (Lockdown group) in C & oacute;rdoba (Spain) were investigated. Lockdown group was divided in early and late lockdown. An additional, control group from data of the same months of the Lockdown in the previous year were recorded to discarded seasonally (adjusted seasonally control) this group was also divided in early and late seasonally adjusted. A logistic regression model for O'Sullivan test has been performed to analyze potential cofounders. Kolgomorov-Smirnov and Kruskal-Wallis test comparing pregnant women who underwent COVID-19 lockdown with the two types of controls.