preferred_name: Whether this is the patient's first test for condition of interest &#x7C; Patient &#x7C; History
preferred_name_lc: whether this is the patient's first test for condition of interest &#x7c; patient &#x7c; history
label: Whether this is the patient's first test for condition of interest &#x7C; Patient &#x7C; History
label_lc: whether this is the patient's first test for condition of interest &#x7c; patient &#x7c; history