is question type collects has answer standard unit Open-Ended Question - Restricted SickleInAfrica Core Data Element Hemoglobin S Level SickleInAfrica CDE - Hemoglobin S Level Question 4 text [scd_hemoglobin_assay_results(3)] = '1' Laboratory Results: Hemoglobin Characterisation (PhenX protocol PX0830301 unless stated otherwise) The Sickle in Africa core data element that collects the proportion of the respondent's hemoglobin that consists of hemoglobin S. Number % Record the levels of Hb S if measured. hbs Percent