Baseline characteristics for the study population, divided by never used MHT vs MHT use ≥ 3 years, are presented in Table 1. The mean age (65.4±5.7 vs 61.3±6.4; P<0.0001) was higher and the median age at menopause (50 [IQR = 45–52] vs 51 [IQR = 48–53]; p<0.0001) was lower in the MHT cohort compared to the never used MHT cohort. For those using MHT, the median number of years of MHT use was 8 (IQR = 5–11) and the mean age of commencement was 47.6±5.3. At the time of CMR examination, 15.2% (n = 78) were still on treatment. There was no significant difference in socioeconomic status measures between MHT users and non-users including Townsend deprivation index, household income or educational attainment.