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Urology. 2019 Feb;124:98-106. doi: 10.1016/j.urology.2018.07.041. Epub 2018 Aug 11.

Association Between Prostate Magnetic Resonance Imaging and Observation for Low-risk Prostate Cancer.

Author information

1
Department of Urology, Yale School of Medicine, New Haven, CT; Yale Cancer Outcomes, Public Policy, and Effectiveness Research Center, New Haven, CT. Electronic address: michael.leapman@yale.edu.
2
Yale Cancer Outcomes, Public Policy, and Effectiveness Research Center, New Haven, CT; Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT.
3
Yale Cancer Outcomes, Public Policy, and Effectiveness Research Center, New Haven, CT; Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT.
4
Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT.
5
Yale Cancer Outcomes, Public Policy, and Effectiveness Research Center, New Haven, CT; Department of Internal Medicine, Yale School of Medicine, New Haven, CT.

Abstract

OBJECTIVE:

To evaluate the association between prostate magnetic resonance imaging (MRI) and the use of observation for men with low-risk prostate cancer (PCa).

MATERIALS AND METHODS:

We used the Surveillance, Epidemiology, and End Results-Medicare database to identify men diagnosed with low-risk PCa during 2010-2013. We assessed the use of prostate MRI and management using claims in period surrounding PCa diagnosis. The relation of clinical and demographic factors to receipt of MRI was evaluated with multivariable logistic regression analysis. Following propensity score matching, we fit conditional logistic regression models to examine the association between prostate MRI and initial management, ie, observation or definitive treatment.

RESULTS:

Of 8144 patients with low-risk PCa, 495 (6.1%) received MRI. Use of MRI increased from 3.4% in 2010 to 10.5% in 2013. A total of 3060 (37.6%) patients received observation. MRI was performed in 265 (8.7%) of patients receiving observation, and 230 (4.5%) who were treated (P < .0001). In multivariable analysis, measures of socioeconomic status were significantly associated with the use of prostate MRI. Following propensity score matching, receipt of prostate MRI surrounding the diagnosis of PCa was associated with a significantly higher likelihood of observation (odds ratio = 1.90, 95% confidence interval: 1.56-2.32). This effect persisted in sensitivity analyses attempting to exclude treatment-planning MRIs.

CONCLUSION:

Receipt of prostate MRI surrounding PCa diagnosis was associated with a nearly 2-fold greater odds of receiving observation vs definitive treatment.

PMID:
30107188
DOI:
10.1016/j.urology.2018.07.041
[Indexed for MEDLINE]

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