MR-guided focused ultrasound (MRgFUS) is effective for the distinct pattern of uterine fibroids seen in African-American women: data from phase III/IV, non-randomized, multicenter clinical trials

Table 2 Alternative treatments following MRgFUS treatment among AA and non-AA according to time of follow-up

Months post-MRgFUS	Number of alternative treatments/total number of AA patients followed	Number of alternative treatments/total number of non-AA patients followed	pvalue^a
3 months post-tx	1/62 (1.6%)	0/59 (0.0%)	0.98
6 months post-tx	1/59 (1.7%)	3/56 (5.4%)
12 months post-tx	5/51 (9.8%)	7/52 (13.5%)
24 months post-tx	18/48 (37.5%)	14/48 (29.2%)
36 months post-tx	23/46 (50.0%)	19/45 (42.2%)

^aTwo-sided p value from the generalized estimating equation (GEE) with a binomial distribution, a logit link, and a compound symmetry covariance structure (to account for the correlation between follow-ups from the same woman), testing whether the odds of seeking alternate treatments are different between races (separate but parallel lines hypothesis), given follow-up time, age, and BMI. tx treatment.