I work in the HR department. The questions are quite common after hiring. It is always up to you what you answer. But never lie because it can later be used to terminate for falsification of information. You can leave a question blank or state refuse to answer. Since I do not know where you specifically work, if you are in a high-risk position, one that requires a security clearance, you do not have the opportunity to not answer. (Leaving questions blank or refusing will effect your ability to get a clearance.)
You really should tract on which type of forms you are putting the information. Always make a copy before turning in. Are they occupational health forms, which should comply under some of the following standards and regulations?
From the Case Management Society of America http://www.cmsa.org/pdf/HICIRprnt.pdf
AAOHN/ACOEM Joint Statement on Confidentiality http://www.aaohn.org/aaohn_acoem_joint_confident.htm
U.S. Department of Health http://himinfo.com/pdf/Privacy_Guidance.pdf
Or are they life insurance, malpractice insurance
, or bonding forms that will impact continued employment? If they are life insurance forms they will be submitted to a national database.