The influence of biological age and sex on long-term outcome after percutaneous coronary intervention for ST-elevation myocardial infarction

• Published in: American journal of cardiovascular disease 2021-01, Vol.11 (5), p.659-678
• Main Authors: Rathod, Krishnaraj S, Jones, Daniel A, Jain, Ajay K, Lim, Pitt, MacCarthy, Philip A, Rakhit, Roby, Lockie, Tim, Kalra, Sundeep, Dalby, Miles C, Malik, Iqbal S, Whitbread, Mark, Firoozi, Sam, Bogle, Richard, Redwood, Simon, Cooper, Jackie, Gupta, Ajay, Lansky, Alexandra, Wragg, Andrew, Mathur, Anthony, Ahluwalia, Amrita
• Format: Article
• Language: English
• Subjects: Original
• ISSN: 2160-200X; 2160-200X

BACKGROUNDOutcome following ST-segment elevation myocardial infarction (STEMI) is thought to be worse in women than in age-matched men. We assessed whether such differences occur in the UK Pan-London dataset and if age, and particularly menopause, influences upon outcome. METHODSWe undertook an observational cohort study of 26,799 STEMI patients (20,633 men, 6,166 women) between 2005-2015 at 8 centres across London, UK. Patient details were recorded at the time of the procedure into local databases using the British Cardiac Intervention Society (BCIS) PCI dataset. Primary outcome was all-cause mortality at a median follow-up of 4.1 years (IQR: 2.2-5.8 years). RESULTSKaplan-Meier analysis demonstrated a higher mortality rate in women versus men (15.6% men vs. 25.3% women, P55 year olds. Age-stratified Cox analysis revealed that female sex was a univariate predictor of all-cause mortality (HR: 1.60 95% CI: 1.25-2.05) in the ≤55 group and in the >55 group (HR: 1.38 95% CI: 1.28-1.47). However, after regression adjustment incorporating the propensity score into a proportional hazard model as a covariate, whilst female sex was not a significant predictor of all-cause mortality in the ≤55 group it was a predictor in the >55 group. Moreover, whilst age did not influence outcome in 55 group was correlated with age. CONCLUSIONSOverall women have a worse all-cause mortality following primary PCI for STEMI compared to men. However, this effect was driven predominantly by women >55 years of age since after adjusting for co-morbidities the risk in younger women did not differ significantly from that in men. These observations support the view that as women advance past the menopausal years their risk of further events following revascularization increases substantially and we suggest that routine assessment of hormonal status may improve clinical decision-making and ultimately outcome for women post-PCI.