A 67-year-old man had a physical examination prior to beginning volunteer work at the hospital.

(A) A blood pressure within acceptable range best demonstrates compliance, but weight loss cannot be accomplished without adherence to medication, diet, and exercise. (B) Absence of side effects does not indicate compliance with medication. Pill counts can be misleading because the client can alter pill counts prior to visit. (C) Left ventricular hypertrophy is not an accurate measure of compliance because hypertrophy frequently does not decrease even with pharmacological management. (D) Therapeutic blood levels measure the drug level at the time of the test. There is no indication of compliance several days before testing.