I would argue the opposite: most cohorts do collect this information. In COHERE in 2011 22 of 29 cohorts provided information on height.

Interesting to know that 22 of 29 COHERE cohorts provided information on height. Is the coverage for this variable good?

The main reason why I think this should be moved out of the core fields in tblBAS is because it's only a useful variable if tblLAB is collected. We do not collect tblLAB in CASCADE, so it's clunky for us to ask our cohorts to provide this. There is not a circumstance I can think of where one would need this information without weight which is contained in tblLAB. My suggestion is to make HEIGH optional if tblLAB is not collected and a core field if tblLAB is collected, or move this variable to tblLAB. I apologize for not specifying this in my first message.