Comparability
For 1999 forward, FAMPHONMED included phone calls for medical advice, prescriptions or test results, but not phone calls to make appointments. For 2000 forward, the question wording was modified and billing questions and prescription refills were also specifically excluded. According to the NHIS survey documentation, these changes apparently affected responses. For 1999 to 2001, phone calls for babies born during the week of the interview were also not included.
