Online Appendix . Participants’ Ability to Access and Understand Specific Information Contained in Medication Guides.

RITALIN / MORPHINE SULFATE / ARANESP
Item / Summary Value / Item / Summary Value / Item / Summary Value
Decision Making Prior to Use
Name 5 types of medications to tell doctor prior to use (M±SD) / 2.3±2.2 / Know that it is alright to use with mild, controlled asthma, % / 29.8 / Identify 4 conditions when not to use (M±SD) / 1.7±1.8
Know that Ritalin is addictive, % / 71.5 / Name 3 conditions where it is not safe to use (M±SD) / 1.2±1.2 / Name 5 conditions to notify doctor prior to use (M±SD) / 3.3±2.0
Name conditions when Ritalin should not be taken (N=6; M±SD) / 1.9±2.0 / Know that Morphine Sulfate is addictive, % / 97.1 / Aware it is alright to use with hypertension, % / 67.3
Identify 4 preexisting conditions to notify doctor prior to use (M±SD) / 2.2±1.4 / Use caution when taking any of what 5 medications (M±SD) / 3.1±2.2
General Use and Storage
Know 2 main indications for use, % / 42.1 / Know symptoms medication treats, % / 93.5 / Knows condition medication treats, % / 17.1
Know what time to take medicine, % / 53.7 / Know that if opioid intolerant, take strongest dose, % / 23.2 / Understands medicine helps body make red blood cells, % / 69.9
Know that a 4 year old should not use Ritalin, % / 83.5 / Know to take medicine with meals, % / 64.6 / Know medicine is given by injection, % / 47.2
Know where to store medication, % / 83.5 / Know that If you miss a dose, to take medicine when you need it, % / 81.5 / Aware that if accidentally stored in freezer, to not use and throw away, % / 77.3
Know to dispose of leftover medicine, % / 41.6
Know not to store medicine in refrigerator, % / 80.0
Side Effects
Name 5 most common side effects (M±SD) / 2.8±2.3 / Aware that using this medicine can be harmful during pregnancy, % / 18.7 / Name 4 symptoms of having antibodies to medicine (M±SD) / 1.5±1.9
Know 2 things doctor will check, % / 46.3 / Name 5 signs of withdrawal (M±SD) / 3.3±1.9 / Name 5 symptoms of blood clots (M±SD) / 3.5±2.0
Name 4 heart-related side effects (M±SD) / 2.0±1.7 / Can define ‘opioid tolerant’, % / 34.5 / Name 3 most common side effects (M±SD) / 1.3±1.4
Know reason why height and weight are checked among children, % / 55.2 / Name 3 serious side effects (M±SD) / 1.7±1.4 / Know why smallest dose possible should be given, % / 20.3
5 most common side effects (M±SD) / 3.7±1.9 / 7 most serious side effects (M±SD) / 2.1±1.9

M=Mean; SD=Standard Deviation. When responses could be deemed dichotomous (true or false, correct, incorrect), percentages are provided. When responses required lists of information, M (SD) is provided to reflect the number correct while the item provided the total possible (i.e. 7 most serious side effects).