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Table 11 Cardiovascular nurses knowledge on how to advise patients on warfarin

From: Education and practice gaps on atrial fibrillation and anticoagulation: a survey of cardiovascular nurses

Question n (%)
While on warfarin the patient:
 • Should not eat spinach  • Can eat spinach once a month  • Can eat as much spinach as he likes whenever he likes • Can eat spinach but needs to eat the same amount every week • Don’t knowSkipped question 9 (18) 1 (2) 2 (4) 34 (69) 3 (6) 6
While out with friends for dinner, your patient has just finished his third glass of wine. This amount of alcohol consumed in a single evening will:
 • Cause a decrease in INR  • Cause an increase in INR  • Does not affect warfarin in any way  • Make the patient sick when taking warfarin medication • Don’t knowSkipped question 7 (15) 26 (55) 3 (6) 1 (2) 10 (21) 8
The best time of day to take warfarin is:
 • At lunchtime  • In the evening  • In the morning before breakfast  • Any time of the day when you remember  • Don’t know  • Skipped question 0 (0) 44 (88) 2 (4) 3 (6) 1 (2) 5
Once the patient has reached a stable warfarin dose, a PT/INR blood test:
 • Should be checked once a year  • Should be checked once every 3 months  • Should be checked at least once every 4 weeks  • Does not need to be checked once on a stable warfarin does • Don’t knowSkipped question 0 (0) 5 (10) 45 (90) 0 (0) 0 (0) 5
A patient just remembered that he forgot to take his warfarin medication dose last night. He/She should:
 • Skip in the dose of warfarin he/she missed  • Take the missed warfarin dose right now  • Wait and take two doses right now  • Take one-half of the missed dose of warfarin right now • Don’t knowSkipped question 29 (58) 8 (16) 0 (0) 8 (16) 5 (10) 5
Once the patient’s warfarin is stopped, how long does it take to get the medication out of his/ her system?
 • 5 h  • 5 days  • 5 weeks  • 5 months  • Don’t know  • Skipped question 1 (2) 38 (76) 2 (4) 0 (0) 9 (18) 5
After starting warfarin, how long(in months/years) would you expect the patient to be taking warfarin?
 • 1 year  • 1 month  • It depends on each person’s needs  • If you start warfarin you will have to be on the medication for the rest of your life • Don’t knowSkipped question 0 (0) 0 (0) 43 (84) 9 (18) 0 (0) 4
Women who are pregnant:
 • Should not take warfarin  • Can safely take warfarin during the second and third trimester • Can take warfarin but only need to take it every others day • Would not need to take warfarin, since being pregnant prevents them from getting blood clots • Don’t knowSkipped question 24 (48) 6 (12) 0 (0) 0 (0) 20 (40) 5
  1. Correct answers are shown in bold