Use of health services and medication use, new comorbidities, and mortality in patients with chronic diseases who did not contract COVID-19 during the first year of the pandemic: a retrospective study and comparison by sex

在新冠疫情第一年，未感染新冠病毒的慢性病患者的医疗服务利用情况、药物使用情况、新发合并症和死亡率：一项回顾性研究及按性别进行的比较