Results remained consistent after excluding 21,052 women age 65 years ( inappropriate aspirin use 15.2 % ; median practice-level inappropriate aspirin use 13.8 % ; interquartile range 8.2 % ; adjusted MRR 1.61 [ 95 % CI : 1.46 to 1.75 ] ) and after excluding patients with diabetes ( inappropriate aspirin use 13.9 % ; median practice-level inappropriate aspirin use 12.4 % ; interquartile range 7.6 % ; adjusted MRR 1.55 [ 95 % CI : 1.41 to 1.67 ] ) .