Nurse interviewer ID number 9999
Dear Understanding Society Team,
In the nurse visit file for wave 2 individuals, b_indsamp_ns, there are 3827 records with nurse interviewer ID 9999 (b_nsintnum). It looks as though this ID was applied to those who refused the nurse visit at the CATI stage or were out of scope/ineligible at CATI, but the numbers do not quite match up (e.g. some households and individuals recorded as CATI refusals have nurse IDs that correspond to nurses in the xivdata_ns file).
Please could you confirm the criteria for applying nurse interviewer ID 9999?