Madrid
Spain
Spanish Agency for Medicines and Medical Devices (AEMPS)
Covid-19, SARS-CoV-2, Omicron, vaccines, effectiveness, Pfizer, Moderna
Missing data, Time-varying, Cox Proportional Hazards regression model, Imputation, Complete cases analysis, Missing category analysis
Thyroiditis, Paediatrics, Girls, Human papillomavirus vaccination, Hazard Ratio, Primary care