Seeland 2020.

Study characteristics
Methods	Retrospective cohort analysis. Cohorts were balanced using propensity score matching, using a nearest neighbor greedy matching algorithm with a caliper of 0.25 times the standard deviation
Participants	Pre‐menopausal women aged 15 to 49 in TriNetX who were COVID positive in the last 7 months (n = 18,892)
Interventions	Use of hormones or hormonal contraception, identified via RxNorm codes for 'estradiol,' 'ethinyl estradiol,' 'progestins,' and 'systemic contraception.' Participants must have taken the drug within the past 1 year
Outcomes	Mortality
Notes	The study does not have information for reason of use of hormones (contraception versus therapeutic). Also does not provide information on current use

BMI = body mass index, COC = combined oral contraceptive, LNG IUD = levonorgestrel intrauterine device.