Table 5.

MRI category, response to medical therapy in relation to luminal narrowing with and without hold up

MRI group	No narrowed lumen	Narrowed lumen no hold up	Narrowed lumen with hold up
1	Response 0% (0/2)	Response 25% (1/4)	Response 0% (0/1)
n = 7	No response 100% (2/2)	No response 75% (3/4)	No response 100% (1/1)
2	Response 100% (5/5)	Response 100% (4/4)	Response N/A
n = 9	No response 0% (0/5)	No response 0% (0/4)	No response N/A
3	Response 66.7% (2/3)	Response 66.7% (2/3)	Response 40% (4/10)
n = 16	No response 33.3% (1/3)	No response 33.3% (1/3)	No response 60% (6/10)
4	Response 83.3% (5/6)	Response 57.1% (4/7)	Response 14.3% (1/7)
n = 20	No response 16.7% (1/6)	No response 42.9% (3/7)	No response 85.7% (6/7)
Total	Response 75.0% (12/16)	Response 61.1% (11/18)	Response 27.8% (5/18)
n = 52	No response 25.0% (4/16)	No response 38.9% (7/18)	No response 72.2% (7/18)