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Table 1 Description of baseline participant characteristics and study measures across study sites

From: When study site contributes to outcomes in a multi-center randomized trial: a secondary analysis of decisional conflict in men with localized prostate cancer

 

Site

p-value

Augusta

Philadelphia

San Antonio

Seattle UW-SCCA

Seattle Puget Sound-VA

(n=91)

(n=88)

(n=25)

(n=225)

(n=47)

 

Median (range)

Median (range)

Median (range)

Median (range)

Median (range)

 

Age

62 (45-78)

66

(43-79)

62

(52-77)

62

(40-86)

63

(52-78)

0.03

 

N

(%)

N

(%)

N

(%)

N

(%)

N

(%)

 

College education or higher

23

25.3

51

58.0

6

24.0

168

74.7

18

38.3

<.0001

Caucasian

39

42.9

84

95.5

12

48

214

95.1

40

85.1

<.0001

Income 35K or less

54

59.3

7

8.0

8

32.0

16

7.1

24

51.1

<.0001

Married/partnered

56

61.5

72

81.8

20

80.0

188

83.6

27

57.4

<.0001

Working (yes)

40

44.0

55

62.5

11

44.0

137

60.9

19

40.4

.005

Program access location (at Clinic)

82

90.1

9

10.2

9

36.0

37

16.4

13

27.7

<.0001

Having a treatment choice at baseline

51

56.0

41

46.6

15

60.0

96

42.7

33

70.2

0.003

Number of doctors consulted

          

<.0001

?0

58

63.7

9

10.2

9

36

52

23.1

18

38.3

 

?1

27

29.7

24

27.3

11

44.0

83

36.9

13

27.7

 

?> 1

6

6.6

55

62.5

5

20.0

90

40.0

16

34.0

 

Perceived knowledge

34

37.4

67

76.1

7

28.0

147

65.3

23

48.9

<.0001

Fair/A lot

Some

26

28.6

14

15.9

9

36.0

57

25.3

8

17.0

 

None/little

31

34.1

7

8.0

9

36.0

21

9.3

16

34.0

 

Information sources (yes)

 

Self

16

17.6

45

51.1

6

24.0

102

45.3

16

34.0

<.0001

Health care provider

79

86.8

58

65.9

22

88.0

166

73.8

43

91.5

0.0005

Media

49

53.8

77

87.5

16

64.0

192

85.3

23

48.9

<.0001

Other people

58

63.7

72

81.8

15

60.0

178

79.1

31

66.0

0.005

STAI

M

SD

M

SD

M

SD

M

SD

M

SD

 

State anxiety

35.7

13.4

42.6

15.0

40.3

16.3

40.6

12.2

39.0

11.9

0.009

Trait anxiety

34.2

11.4

33.7

11.0

35.6

12.9

32.5

8.8

36.0

11.2

0.16

EPIC-SF questionnaire

           

Urinary irritative

87.5

16.5

93.8

11.1

87.5

18.2

87.5

15.8

87.5

14.8

0.02

Urinary incontinence

100

16.2

100

10.4

91.8

16.8

100

12.8

100

13.9

0.02

Bowel symptoms

100

13.4

100

9.7

95.8

13.2

100

9.8

100

12.0

0.04

Sexual symptoms

61.8

32.6

72.3

30.6

30.5

29.4

78.5

26.9

66.7

28.5

<.0001

Hormonal symptoms

90

14.8

95

12.2

85

20.7

95

11.0

90

10.6

<.0001

  1. Note: M = Mean, SD = standard deviation STAI = State Trait Anxiety Inventory (scores range from 20-80 with higher scores indicating more anxiety), EPIC-SF = Expanded Prostate Index Composite-Short Form (scores range from 0-100 with higher scores indicating better HRQOL); One-way ANOVA and Chi-square test were used for comparing means and proportions across sites.
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