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Your search keyword '"Patel, R.R."' showing total 125 results
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125 results on '"Patel, R.R."'

13. Phase II Trial of High-Dose Radiotherapy vs. Low-Dose Radiation, Demonstrating Low-Dose Mediated Immune-Cell Infiltration

Author

He, K., primary, Patel, R.R., additional, Barsoumian, H.B., additional, Chang, J.Y., additional, Tang, C., additional, Comeaux, N.I., additional, Ning, M.S., additional, Gandhi, S., additional, Davies, M., additional, Glitza, I., additional, Hong, D.S., additional, Heymach, J., additional, Nguyen, Q.N., additional, Diab, A., additional, Chun, S.G., additional, Lee, P., additional, Blumenschein, G.R., additional, Fossella, F.V., additional, Chen, D., additional, and Welsh, J.W., additional

Published
2021
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14. Nasopharynx Cancer in the U.S.: Disparities in Stage at Presentation.

Author

Dee, E.C., Patel, R.R., Lapen, K., Wu, Y., Yang, F., Wang, S., Patel, T.A., McBride, S., and Lee, N.Y.

Subjects
*BLACK people, *PACIFIC Islanders, *NASOPHARYNX cancer, *KOREANS, *ZIP codes
Abstract

Although nasopharynx cancer (NPC) is rare in the US, global epidemiology varies greatly. Therefore, understanding NPC disparities in the diverse US setting is critical. We explored differences in NPC stage at diagnosis in the US, with a focus on disaggregated Asian American (AA) patients. Data from the National Cancer Database (NCDB, 2004 to 2021) identified patients with NPC; NCDB allows disaggregation by AA subgroups (Indian and Pakistani aggregated in earlier years). Patients were disaggregated by self-identified subgroup; multivariable ordinal logistic regression adjusting for demographic and socioeconomic factors defined adjusted odds ratios (aORs; higher aORs represent more advanced NPC). Models were calculated before and after disaggregation Asian American subgroups and Native Hawaiian and Other Pacific Islander groups. Of 20267 patients, most were white (12419, 61.3%), Black (3114, 15.4%), Chinese (1431, 7.1%), Filipino (549, 2.7%), and Vietnamese (441, 2.2%). Black patients and Korean patients were less likely to be insured (χ2 P<0.001). Black patients and Native American patients were more likely to live in lower-income ZIP codes (χ2 P<0.001); Chinese, Japanese, Filipino, Hawaiian, and Korean patients were more likely to live in higher-income ZIP codes (χ2 P<0.001). Prior to disaggregation, proportion of distant metastatic disease at presentation was 43.4% among white patients (ref), 50.9% among Black patients (aOR 1.12, P = 0.013), 49.5% among Native American patients (aOR 1.19, P>0.05), 41.9% among AA patients (aOR 0.97, P>0.05), and 52.0% among Native Hawaiian and other Pacific Islander patients (aOR 1.48, P = 0.018). Upon disaggregation, proportion of distant metastatic disease was greatest (>50%) among Hmong (70.7%, aOR 2.91, P<0.001)), Laotian (61.9%, aOR 2.24, P = 0.001), non-Hawaiian Pacific Islander (56.8%, aOR 1.83, P = 0.004), and Black (50.9%, aOR 1.12, P = 0.013) patients. The proportion of distant metastatic disease at presentation was similar or lower than white patients among Chinese (36.4%, aOR 0.72, P<0.001), Indian/Pakistani (38.0%, aOR 0.90, P>0.05), and Hawaiian (42.4%, aOR 1.01, P>0.05) patients. Of patients with no insurance, 61.3% presented with distant metastatic disease (vs 39.6% of those with private insurance and 42.3% of those with Medicare). Of patients in the lowest-income ZIP codes, 51.0% presented with metastatic disease, compared with 40.1% of patients in the highest-income ZIP codes (P<0.05 for these comparisons). Although most NPC patients were white, Black, or Chinese, distant metastatic disease at presentation was commonest among Hmong, Laotian, non-Hawaiian Pacific Islander, and Black patients, even having adjusted for social determinants of health. These findings underscore the limitations of evaluating diverse groups as a monolith, highlighting the value of disaggregated research, and improving awareness of NPC among less canonically affected groups. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Concurrent Immunotherapy and Stereotactic Radiosurgery for Patients with Melanoma Brain Metastases is not Associated with Increased Risk of Brain Radionecrosis

Author

Augustyn, A., primary, Ludmir, E.B., additional, Patel, R.R., additional, Maldonado, A., additional, Bishop, A.J., additional, Chung, C., additional, Ghia, A.J., additional, McAleer, M.F., additional, McGovern, S.L., additional, Woodhouse, K.D., additional, Yeboa, D.N., additional, Briere, T.M., additional, Haydu, L.E., additional, Ferguson, S., additional, Guha-Thakurta, N., additional, Glitza, I., additional, and Li, J., additional

Published
2020
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19. Phase II Trial of Low-Dose Radiation for Metastases Progressing on Immunotherapy

Author

Patel, R.R., primary, Guo, C., additional, Hong, D.S., additional, Chang, J.Y., additional, Altan, M., additional, Chun, S.G., additional, Diab, A., additional, Davies, M., additional, Nguyen, Q.N., additional, Barsoumian, H., additional, Simon, G.R., additional, Glitza, I., additional, Tang, C., additional, Verma, V., additional, Comeaux, N., additional, and Welsh, J.W., additional

Published
2020
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20. Abscopal Response Rates after Salvage Radiation in Patients with Progressive Disease on Immunotherapy

Author

Patel, R.R., primary, Guo, C., additional, Hong, D.S., additional, Chang, J.Y., additional, Altan, M., additional, Chun, S.G., additional, Diab, A., additional, Davies, M., additional, Nguyen, Q.N., additional, Barsoumian, H., additional, Simon, G.R., additional, Glitza, I., additional, Tang, C., additional, Verma, V., additional, Comeaux, N., additional, and Welsh, J.W., additional

Published
2020
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25. Determination of the s‐phase formation coefficient of plasma nitrided austenitic steel.

Author

Reinders, P.M., Patel, R.R., Musekamp, J., Kaestner, P., Hoche, H., Bräuer, G., and Oechsner, M.

Subjects
*NITRIDING, *AUSTENITIC steel, *SURFACE hardening, *AUSTENITIC stainless steel, *GLOW discharges, *SCANNING electron microscopes
Abstract

Plasma nitriding is an effective surface hardening treatment for austenitic stainless steels. During plasma nitriding, s‐phase formation takes place which is not only responsible for high hardness and wear resistance but also for good corrosion resistance. In order to estimate the thickness of the s‐phase for austenitic stainless steel in a plasma nitriding process, an empirical model is devised. A number of plasma nitriding processes of austenitic stainless steel (304 L) were carried out with varying treatment temperature from 360 °C to 450 °C and process duration ranging from 10 hours to 24 hours with constant pressure, voltage, pulse‐to‐pause‐ratio and gas mixture. A time‐temperature dependent s‐phase formation coefficient is determined by measuring the thickness of the s‐phase using a scanning electron microscope (SEM) and glow discharge optical emission spectroscopy (GDOES). The developed model is verified by three controlled experiments. This model fits the thickness of the s‐phase with an error of less than 6 %. [ABSTRACT FROM AUTHOR]

Published
2021
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49. 2037

Author

Becker, S.J., primary, Patel, R.R., additional, and Mackie, T.R., additional

Published
2006
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50. 1088

Author

Patel, R.R., primary, Schubert, L.K., additional, Becker, S.J., additional, and Das, R.K., additional

Published
2006
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