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Table 1 Patient clinical and demographic characteristics

From: Stereotactic body radiotherapy versus conventional/moderate fractionated radiation therapy with androgen deprivation therapy for unfavorable risk prostate cancer

Covariate

Statistics

Level

Radiation group

Parametric P-valuea

SBRT N = 558

EBRT N = 40,797

Race

N (Col %)

White

415 (75.73)

32,076 (79.47)

0.07

N (Col %)

Black

114 (20.8)

6923 (17.15)

N (Col %)

Other

19 (3.47)

1363 (3.38)

Facility Type

N (Col %)

Non-academic program

237 (42.47)

28,382 (69.57)

<.001

N (Col %)

Academic program

321 (57.53)

12,415 (30.43)

Median Income Quartiles

N (Col %)

< $30,000

76 (14.07)

5527 (13.96)

<.001

N (Col %)

$30,000 - $34,999

60 (11.11)

7315 (18.47)

N (Col %)

$35,000 - $45,999

130 (24.07)

11,117 (28.07)

N (Col %)

> = $46,000

274 (50.74)

15,643 (39.5)

Year of diagnosis

N (Col %)

2004–06

92 (16.49)

8811 (21.6)

<.001^

N (Col %)

2007–09

109 (19.53)

9121 (22.36)

N (Col %)

2010–12

127 (22.76)

10,852 (26.6)

N (Col %)

2013–15

230 (41.22)

12,013 (29.45)

Insurance status

N (Col %)

Not Insured

12 (2.2)

744 (1.85)

0.787

N (Col %)

Private

146 (26.79)

10,563 (26.25)

N (Col %)

Government insurance

387 (71.01)

28,931 (71.9)

Facility Location

N (Col %)

Northeast

188 (33.69)

10,369 (25.42)

<.001

N (Col %)

South

155 (27.78)

13,291 (32.58)

N (Col %)

Midwest

112 (20.07)

10,751 (26.35)

N (Col %)

West

103 (18.46)

6386 (15.65)

Risk group

N (Col %)

Unfavorable intermediate

130 (23.3)

5094 (12.49)

<.001

N (Col %)

High

428 (76.7)

35,703 (87.51)

Distance to facility

N (Col %)

0–10 miles

250 (44.88)

22,460 (55.25)

<.001

N (Col %)

10–50 miles

212 (38.06)

15,550 (38.25)

N (Col %)

50+ miles

95 (17.06)

2641 (6.5)

Charlson comorbidity score

N (Col %)

0

472 (84.59)

34,616 (84.85)

0.197

N (Col %)

1

74 (13.26)

4825 (11.83)

N (Col %)

2+

12 (2.15)

1356 (3.32)

Urban/Rural Location

N (Col %)

Metro

439 (82.06)

31,912 (80.12)

0.022

N (Col %)

Urban

92 (17.2)

6854 (17.21)

N (Col %)

Rural

4 (0.75)

1064 (2.67)

Age at Diagnosis

N

 

558

40,797

0.980

Mean

 

70.18

70.19

Median

 

71

71

Min

 

43

40

Max

 

90

90

Std Dev

 

7.95

7.91

  1. a Parametric p-value calculated by ANOVA for numerical covariates and chi-square test for categorical covariates
  2. ^ P-value calculated by Cochran-Armitage test for trend