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Table 2 Respondent characteristics by tracking/privacy condition and incentive, results reported as a percentage (%)

From: Impact of different privacy conditions and incentives on survey response rate, participant representativeness, and disclosure of sensitive information: a randomized controlled trial

Characteristic

Overall

By tracking/privacy condition

By incentive

  

Confidential

Anonymized-Envelope

Anonymous-Postcard

$10

$20

 

N = 196

n = 61

n = 69

n = 66

n = 85

n = 111

Age > =50 years

44.4

42.6

50.7

39.4

56.5

35.1***

Race

      

 White

52.6

55.7

47.8

54.5

54.1

51.4

 Black

27.0

21.3

34.8

24.2

22.4

30.6

 Hispanic

6.1

8.2

5.8

4.5

8.2

4.5

Some college experience

74.5

75.4

73.9

74.2

76.5

73.0

Married

67.4

67.8

65.2

69.2

66.3

68.2

Working for pay

61.0

61.0

55.2

67.2

51.9

67.3*

Served in Army

60.2

63.9

56.5

60.6

63.5

57.7

Receiving VA disability benefits:

      

 Per the administrative record

84.2

90.2

82.6

80.3

87.1

82.0

 Per self-report

68.4

75.4

71.0

59.1

76.5

62.2*

VA visit in past year:

      

 Any type

78.1

82.0

87.0

65.2*

81.2

75.7

 Primary care

67.9

67.2

79.7

56.1

68.2

67.6

 Mental health

51.0

54.1

65.2

33.3***

60.0

44.1

  1. Bold face font signifies a statistically significant difference across group.
  2. *p ≤ 0.05, ***p ≤ 0.001.