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. Author manuscript; available in PMC: 2021 Mar 10.
Published in final edited form as: J Urol. 2019 Jul 30;203(1):128–136. doi: 10.1097/JU.0000000000000471

Table 1:

Characteristics of the patient population

Characteristics Patients cared for in networks performing SBRT* Patients cared for in networks not performing SBRT P value**
Number of patients 3437 39,526
Age, years (%) 0.07
66–69 940 (27.3) 10,448 (26.4)
70–74 1218 (35.4) 13,817 (35.0)
75–79 813 (23.7) 9239 (23.4)
80 or older 466 (13.6) 6022 (15.2)
Race/ethnicity (%) <0.001
White 2801 (81.5) 32,660 (82.6)
Black 442 (12.9) 4020 (10.2)
Hispanic 37 (1.1) 725 (1.8)
Asian 73 (2.1) 938 (2.4)
Other 84 (2.4) 1183 (3.0)
Marital Status (%) <0.001
Married 2424 (70.5) 26,412 (66.8)
Not married 673 (19.6) 6800 (17.2)
Unknown 340 (9.9) 6314 (16.0)
Comorbidity (%) 0.45
0 2126 (61.9) 24,757 (62.6)
1 795 (23.1) 9157 (23.2)
2 or more 497 (14.5) 5445 (13.8)
Unknown 19 (0.6) 167 (0.4)
Tumor stage (%) <0.001
T1 or less 2059 (59.9) 22,797 (57.7)
T2 1153 (33.5) 14,594 (36.9)
T3/T4 125 (3.6) 958 (2.4)
Unknown 100 (2.9) 1177 (3.0)
Disease risk classification (%) 0.06
Lower 947 (27.6) 11,490 (29.1)
Higher 2490 (72.4) 28,036 (70.9)
Population of county of residence (%) <0.001
1 million or more 2207 (64.2) 21,182 (53.6)
250,000–999,999 727 (21.2) 7541 (19.1)
250,000 or less 503 (14.6) 10,775 (27.3)
Unknown -- 28 (0.1)
At least a high school education in ZIP code of residence (%) <0.001
Low (0–75) 292 (8.5) 4687 (11.9)
High (>75) 3079 (89.6) 33,934 (85.9)
Unknown 66 (1.9) 905 (2.3)
Median household income in ZIP code of residence, $ (%) <0.001
40,000 or less 411 (12.0) 6355 (16.1)
40,001–60,000 819 (23.8) 14,006 (35.4)
60,001 or more 2141 (62.3) 18,213 (46.1)
Unknown 66 (1.9) 952 (2.4)
Geographic region (%) <0.001
Northeast 1553 (45.2) 7570 (19.2)
South 540 (15.7) 9363 (23.7)
Central 184 (5.4) 7440 (18.8)
West 1160 (33.8) 15,153 (38.3)
Year of diagnosis (%) <0.001
2007 308 (9.0) 9148 (23.1)
2008 566 (16.5) 8263 (20.9)
2009 758 (22.1) 7699 (19.5)
2010 854 (24.8) 7270 (18.4)
2011 951 (27.7) 7146 (18.1)
Treatment (%) <0.001
SBRT 535 (15.6) --
IMRT 1230 (35.8) 11,922 (30.2)
Robotic prostatectomy 363 (10.6) 6013 (15.2)
Radical prostatectomy 189 (5.5) 2435 (6.2)
Brachytherapy 363 (10.6) 7967 (20.2)
Active surveillance 456 (13.3) 5598 (14.2)
Other treatments*** 301 (8.8) 5591 (14.1)

Abbreviations: IMRT, intensity-modulated radiation therapy; SBRT, stereotactic body radiation therapy

Percentages might not sum to 100 because of rounding

*

Once a network performed SBRT, all patients in that network were cared for in “a network performing SBRT” from that year until the end of the study period. Patients treated in networks prior to the year of SBRT adoption were cared for in “a network not performing SBRT”.

**

P values generated from chi-square tests

***

Other treatments include external beam radiotherapy, proton beam therapy, perineal prostatectomy, hormonal therapy, and cryotherapy