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Table 4 Percentage (%) of respondents fully completing all items in a potentially sensitive scale by tracking/privacy condition and incentive

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

Scale/Item

Number of items in scale

Percentage (%) completing all items in the scale

  

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

Sexual Orientation

1

98.5

100

98.6

95.5

97.6

98.2

Sexual Abuse

8

92.9

93.4

94.2

90.9

91.8

93.7

Other Traumatic events:

       

 Combata

26

89.3

86.5

96.8

85.7

89.1

89.5

 Childhood physical abuse

5

96.4

96.7

97.1

95.5

95.3

97.3

Past-year events:

       

 Economic hardship

1

98.5

100

97.1

98.5

97.6

99.1

 Emotional abuse/neglect

1

99.0

98.4

100

98.5

98.8

99.1

 Crime victim

1

99.0

100

98.6

98.5

97.6

100

 Physical attack

1

98.5

98.4

98.6

98.5

97.6

99.1

Mental health screens

       

 Depression

5

99.0

100

98.6

98.5

98.8

99.1

 PTSD

26

96.9

100

97.1

93.9

94.1

99.1

 Problem drinking

5

100

100

100

100

100

100

  1. aAmong those who said they experienced any combat in the Gulf.