BMI	body mass index
CA	cancer antigen
CC	case control
CEBM	Centre for Evidence-Based Medicine
CEE	conjugated equine estrogen
CI	confidence interval
CS	cohort study
DRSP	drospirenone
E2	estradiol
EC	endometrial cancer
EMBASE	excerpta medica database
FIGO	International Federation of Gynecology and Obstetrics (Fédération Internationale de Gynécologie et d’Obstétrique)
HR	hazard ratio
HT	hormone therapy
ICTRP	International Clinical Trials Registry Platform
IQR	interquartile range
LN	lymph node
MPA	medroxyprogesterone acetate
NRS	non-randomized study
OR	odds ratio
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
RCT	randomised controlled trial
RR	relative risk
RT	radiotherapy