For the laboratory item 50983 there seems to be an issue with incorrect boundaries in MIMIC-IV:
(With the exception of 2 values of 117 mmol/l) all reported numerical values lie between 125 mmol/l and 150 mmol/l. This is in stark contrast to the MIMIC-III data and does not make any sense at all from a clinical standpoint. One would expect thousands of values below and above these thresholds.
The missing values are probably hidden within the more than 500000 "double underscores" reported (in contrast to only 2 in MIMIC-III).
Is there a way to fix this bug? Thanks a lot for looking into this!