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Table 3 Multiple logistic regression for participation in the Millennium Cohort Family Study

From: Assessing and adjusting for non-response in the Millennium Cohort Family Study

Service member characteristic Model 1: demographic, military and administrative characteristics Model 2: all characteristics
Odds ratio (95% CI) P-value Odds ratio 95% CI) P-value
 Demographic, service, and administrative characteristics
 Gender
  Female 0.32 (0.30–0.36) <0.0001 0.33 (0.31–0.37) <0.0001
  Male Reference   Reference  
 Age group
  17–24 years 0.93 (0.85–1.02) 0.0305 0.93 (0.84–1.01) 0.0215
  25–29 years 1.02 (0.94–1.11)   1.01 (0.93–1.10)  
  30+ years Reference   Reference  
 Race/ethnicity
  Black, non-Hispanic 0.54 (0.49–0.60) <0.0001 0.55 (0.50–0.61) <0.0001
  Hispanic 0.76 (0.69–0.83)   0.77 (0.70–0.84)  
  Other 0.76 (0.68–0.84)   0.77 (0.70–0.86)  
  White, non-Hispanic Reference   Reference  
 Education
  < High school completion/diploma 0.59 (0.30–1.14) <0.0001 0.83 (0.42–1.65) <0.0001
  High school graduate/GED 0.83 (0.77–0.88)   0.83 (0.78–0.90)  
  Advanced degree 1.32 (1.12–1.56)   1.30 (1.10–1.54)  
  Bachelor's degree 1.22 (1.10–1.35)   1.20 (1.08–1.32)  
  Some college Reference   Reference  
 Income
  < $50,000 0.88 (0.79–0.98) <0.0001 0.91 (0.82–1.02) 0.0411
  $50,000–$74,999 0.96 (0.86–1.07)   0.97 (0.87–1.08)  
  Missing 1.24 (1.03–1.50)   1.20 (0.93–1.55)  
  $75,000+ Reference   Reference  
 Number of dependent children
  Three or more 0.99 (0.90–1.10) 0.0121 1.01 (0.91–1.12) 0.0043
  Two 1.10 (1.02–1.19)   1.12 (1.03–1.21)  
  One 1.09 (1.02–1.17)   1.11 (1.03–1.18)  
  None Reference   Reference  
 Component
  Reserve/National Guard 1.04 (0.97–1.12) 0.2587 1.03 (0.96–1.11) 0.3963
  Active duty Reference   Reference  
 Service branch
  Air Force 0.98 (0.90–1.06) 0.0104 0.92 (0.84–1.00) 0.0008
  Marine Corps 1.05 (0.97–1.14)   1.05 (0.97–1.14)  
  Navy/Coast Guard 1.13 (1.04–1.23)   1.11 (1.02–1.21)  
  Army Reference   Reference  
 Paygrade
  Officer 1.38 (1.20–1.57) <0.0001 1.35 (1.18–1.54) <0.0001
  Enlisted Reference   Reference  
 Deployment/combat
  Deployed, in combat 1.05 (0.98–1.14) 0.5210 1.09 (1.01–1.18) 0.1490
  Deployed, no combat 1.07 (0.96–1.19)   1.07 (0.96–1.19)  
  Deployed, unknown combat 0.97 (0.76–1.24)   0.93 (0.71–1.22)  
  Not deployed Reference   Reference  
 P4 interview completion
  Partial 0.61 (0.48–0.77) <0.0001 0.64 (0.42–0.96) 0.0296
  Complete Reference   Reference  
 P4 respondent referred spouse
  Yes 6.41 (6.04–6.79) <0.0001 6.53 (6.16–6.93) <0.0001
  No Reference   Reference  
 Health behaviours
  Average hours of sleep/day
  <6 h    0.84 (0.77–0.93) <0.0001
  6 h    0.91 (0.83–1.00)  
  7 h    1.08 (0.99–1.18)  
  >8 h    1.10 (0.94–1.28)  
  Missing    0.92 (0.69–1.23)  
  8 h    Reference  
 Description of usual activities
  Heavy work    1.12 (1.00–1.24) 0.0066
  Light loads, or climb often    1.04 (0.96–1.13)  
  Stand/walk a lot, little lifting    0.95 (0.88–1.02)  
  Missing    1.11 (0.82–1.50)  
  Sit during day, walk little    Reference  
 Body mass index
  30.0+    0.98 (0.90–1.07) 0.0120
  25.0–29.9    0.97 (0.91–1.04)  
  Missing    0.57 (0.41–0.80)  
  < 25.0    Reference  
 Days work missed due to illness or injury
  16+ days    1.19 (1.08–1.31) 0.0124
  6–15 days    1.01 (0.91–1.13)  
  1–5 days    1.03 (0.96–1.10)  
  Missing    1.07 (0.86–1.32)  
  None    Reference  
 Mental health
  VR-36 mental component
  Highest 15%    0.97 (0.90–1.06) 0.0405
  Lowest 15%    0.99 (0.90–1.09)  
  Missing    1.41 (1.10–1.81)  
  Middle 70%    Reference  
 Stress and relationship issues
  Stress: no one to turn to
  Bothered a lot    0.92 (0.80–1.05) 0.0085
  Bothered a little    0.89 (0.81–0.97)  
  Missing    0.65 (0.45–0.95)  
  Not bothered    Reference  
 Stress: financial
  Bothered a lot    0.81 (0.73–0.89) 0.0007
  Bothered a little    0.95 (0.89–1.01)  
  Missing    0.88 (0.57–1.36)  
  Not bothered    Reference  
 Attitude towards military
  Negative/somewhat negative    0.92 (0.85–1.00) 0.0007
  Neither negative or positive    0.85 (0.78–0.92)  
  Missing    1.07 (0.79–1.43)  
  Positive/somewhat positive    Reference  
 Stressful events since 2008
  3 or more    1.06 (0.97–1.17) 0.0347
  1 or 2    1.09 (1.03–1.16)  
  Missing    0.84 (0.54–1.32)  
  None    Reference