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Table 6 Percentage of Women with Self-Reported Combat and Military Sexual Assault Experiences by Different Missingness Mechanisms and Study-Arm Manipulation

From: Impact of different cover letter content and incentives on non-response bias in a sample of Veterans applying for Department of Veterans Affairs disability benefits: a randomized, 3X2X2 factorial trial

Characteristic

Overall

N = 480

What Veterans were told about content

How name was obtained

Honoraria

Range across manipulations

Combat

n = 160

Unwanted Sexual Attention

n = 160

Lifetime/military experiences

n = 160

List of OEF/OIF/OND Veterans

n = 240

List of Veterans Applying for disability benefits

n = 240

$20

n = 240

$40

n = 240

Self-reported combat if

 Missing completely at random

 

64.2%

63.5%

73.5%

66.8%

67.7%

67.0%

67.4%

10.0

 Missing at random

 

62.3%

60.6%

71.4%

65.8%

63.7%

63.9%

65.6%

10.8

 Not missing at random

 

55.6%

53.2%

63.7%

56.8%

58.3%

56.4%

58.7%

10.5

 Variance across the 3 missingness assumptions

 

0.00197

0.00282

0.00266

0.00303

0.00223

0.00297

0.00211

0.00106

 Range across the 3 assumptions

 

8.6

10.3

9.8

10.0

9.4

10.6

8.7

2.0

 Combat exposure per VA administrative data (%)

41.3%

40.6%

37.5%

45.6%

38.8%

43.8%

43.3%

39.2%

6.3

Self-reported military sexual assault if:

 Missing completely at random

 

50.1%

64.3%

52.5%

54.3%

57.2%

61.2%

50.2%

14.2

 Missing at random

 

51.0%

66.5%

51.6%

54.8%

57.9%

60.8%

51.9%

15.5

 Not missing at random

 

49.8%

59.6%

47.5%

50.7%

54.0%

57.3%

47.3%

12.3

 Variance across the 3 missingness assumptions

 

0.00004

0.00124

0.00071

0.00050

0.00043

0.00046

0.00054

0.0012

 Range across the 3 assumptions

 

1.2

6.9

5.0

4.1

3.9

3.9

4.6

5.7

 Military sexual trauma exposure per VA administrative dataa

45.6%

43.8%

45.0%

48.1%

45.5%

45.8%

45.4%

45.8%

4.3

  1. VA Department of Veterans Affairs. aVA administrative data assesses military sexual assault plus severe sexual harassment