AVR  aortic valve replacement
CI  confidence interval
EQ5D  EuroQol 5-dimension
HFRS  Hospital Frailty Risk Score
HR  hazard ratio
HTA  health technology assessment
ICER  incremental cost effectiveness ratio
IMD  index of multiple deprivation
IQR  interquartile range
IRR  incidence risk ratio
KCCQ  Kansas City Cardiomyopathy Questionnaire
LES  logEuroScore
MD  mean difference
NHS  National Health Service
NICE  National Institute for Health and Care Excellence
OR  odds ratio
PMP  per million population
QALY  quality adjusted life years
RCT  randomised controlled trial
ROBINS-I  risk of bias in non-randomised studies of interventions
RR  relative risk
SAVR  surgical aortic valve replacement
SD  standard deviation
SMD  standardised mean difference
SHTG  Scottish Health Technologies Group
S/T  subclavian/transaxilliary
STS-PROMS  STS Predicted Risk of Mortality
TA  transapical