Reduced echo-derived LVEF 9m post-ECG

description: >-
  This task predicts whether the patient will have an echo-derived LVEF < 50% within 9 months of an ECG. To be
  included, patients must have a prior diagnosis of HF and have at least one measurement at or more than 9
  months after the ECG.

predicates:
  # Plain predicates
  echo_derived_reduced_lvef:
    code: { regex: "LAB//227008.*" }
    value_min: null
    value_max: 0.50

  ECG: 
    code: PROCEDURE//ICD//9//8952	

  HF:
    code: { regex: "^DRG.*HEART FAILURE.*" }

trigger: ECG

windows:
  has_HF:
    start: null
    end: trigger
    start_inclusive: True
    end_inclusive: True
    has:
      HF: (1, None)
  input:
    start: null
    end: trigger
    start_inclusive: True
    end_inclusive: True
    index_timestamp: end
  target:
    start: input.end
    end: start + 270d
    start_inclusive: False
    end_inclusive: True
    label: echo_derived_reduced_lvef
  censoring:
    start: target.end
    end: null
    start_inclusive: False
    end_inclusive: True
    has:
      _ANY_EVENT: (1, None)