CAT Score - method to numerically capture how well the patient was compliant to their dosing and diet since the last reading

The CAT Score is made up of several categories, with the objective to keep the score as low as possible to zero (equates to perfect compliance)

Missed Doses: No missed doses since last reading (0 pts) Missed one dose since last reading (1 pt) Missed two doses since last reading (2 pts) Missed 3 or more doses since last reading (3 pts)

Additional Doses: No extra doses since last reading (0 pts) Took one extra dose since last reading (1 pt) Took 2 extra doses since last reading (2 pt) Took 3 or more extra doses since last reading (3 pt)

More Vitamin K: No additional Vitamin K taken since last reading (0 pts) Ate 1-2 more servings of Vitamin K than usual since last reading (1 pt) Ate 3-4 more servings of Vitamin K than usual since last reading (2 pts) Ate 4 or more servings of Vitamin K than usual since last reading (3 pt)

Less Vitamin K: No additional Vitamin K taken since last reading (0 pts) Ate 1-2 less servings of Vitamin K than usual since last reading (1 pt) Ate 3-4 less servings of Vitamin K than usual since last reading (2 pts) Ate 4 or less servings of Vitamin K than usual since last reading (3 pt)

Alcohol: Drank the usual amount of alcohol since last reading (0 pts) Drank more than the usual amount of alcohol since last reading (1 pt) Drank excessive amount of alcohol (binged) since last reading (2 pt)

Sample Patient: Since last INR reading, John Doe had 2 alcoholic drinks, did not miss any doses, had one additional dosage taken, and had a 3-4 excess servings of Vitamin K than normal.

Missed Doses: 0 pts
Additional Doses: 1 pt
More Vitamin K: 2 pts
Less Vitamin K: 0 pts
Alcohol: 1 pt

Total CAT Score = 4 pts

INR Pro will calculate an average CAT score by patient and across all patients, as shown below

Want to learn more? Read published AHRQ article about CAT score >>>