Randomisation, data collection and data management
ischaemia
ISCHAEMIA, DELHI
Sequentially numbered opaque sealed envelopes were provided to the nuclear medicine departments at the recruiting centres. Envelopes were prepared at the central data management centre at the Indian Institute of Public Health, Delhi based on the sequence generated using stratified block randomization using Stata 13 (College Station, TX). Clinical sites were the stratifying factor. When an eligible and consenting, patient was identified by the interventional cardiologist, the nuclear physician opened the envelope to reveal the management strategy (ischaemia guided or routine non-culprit PCI). Data were entered into a validated clinical data management system with inbuilt checks and audit trail (Clinion, 