Table 4 Univariate and multivariate analyses of DNBI rates among surveyed personnel aboard USNS COMFORT during CP11

  ≤ 25 (referent)

1.00

1.00

 26–35

1.17

0.049

1.23

0.009

 36+

0.87

0.133

0.90

0.316

 Male (referent)

1.00

 Female

1.00

0.977

 Enlisted (referent)

1.00

1.00

 Officers

1.07

0.440

1.23

0.025

 Civilian

0.76

0.024

0.93

0.934

 Army (referent)

1.00

 Air Force

1.60

0.144

 Navy

1.65

0.087

 NGO

1.30

0.412

 Other

1.74

0.089

Days off Ship (continuous)

1.10

<0.001

1.09

<0.001

 Jamaica

0.75

0.036

1.07

0.672

 Peru

0.70

0.025

1.03

0.889

 Ecuador

1.60

<0.001

1.81

<0.001

 Colombia

1.39

0.001

1.39

0.002

 Nicaragua

1.13

0.366

1.61

0.002

 Guatemala

1.24

0.072

1.64

<0.001

 El Salvador

1.60

<0.001

2.06

<0.001

 Costa Rica

0.81

0.072

1.10

0.472

 Haiti

0.52

<0.001

0.84

0.270

 Air detachment

1.29

0.127

1.45

0.062

 Boat detachment

0.70

0.316

0.93

0.837

 DAS

0.82

0.166

1.05

0.795

 Destroyer Squadron

0.71

0.278

0.75

0.374

 DFA

0.97

0.805

1.11

0.539

 Medical services

1.00

0.996

1.17

0.268

 Surgical services

0.74

0.003

0.96

0.790

 Nursing services

1.29

0.004

1.48

0.007

 Maritime Expeditionary Security Squadron

0.73

0.286

1.13

0.698

 Naval Mobile Construction Battalion

2.25

<0.001

3.17

<0.001

 Manpower/Personnel

0.83

0.453

1.20

0.521

 Security

1.27

0.025

1.71

<0.001

 Information operations

0.63

0.062

0.71

0.210

 Communications

1.17

0.546

1.39

0.247

 Public Affairs Office/Band

1.29

0.174

1.35

0.164

 Translator

0.90

0.665

1.01

0.969

 Operations

0.93

0.799

1.16

0.589

 Other

0.74

0.016

0.80

0.061