Table 3.
Predictors of Alcohol Use Outcomes among Previously Deployed Military Personnel. Bivariate and Multivariate Associations from Negative Binomial Regression Models
| Frequency of Use | Frequency of Binge Drinking | |||||||
|---|---|---|---|---|---|---|---|---|
| Bivariate | Multivariate* | Bivariate | Multivariate* | |||||
| IRR | 95% CI | aIRR | 95% CI | IRR | 95% CI | aIRR | 95% CI | |
| Branch | ||||||||
| Army (Reference) | 1.00 | 1.00 | 1.00 | 1.00 | ||||
| Navy | 0.93 | (0.70, 1.24) | 1.10 | (0.65, 1.10) | 0.72 | (0.39, 1.32) | 0.96 | (0.39, 0.96) |
| Marine Corps | 1.11 | (0.80, 1.52) | 1.52 | (0.82, 1.52) | 1.34 | (0.89, 2.01) | 1.75 | (0.77, 1.75) |
| Air Force | 0.70 | (0.50, 0.98) | 0.88 | (0.49, 0.88) | 0.33 | (0.15, 0.70) | 0.76 | (0.18, 0.76) |
| Current Duty Status | ||||||||
| Active (Reference) | 1.00 | 1.00 | 1.00 | 1.00 | ||||
| Reserve/Guard | 0.90 | (0.57. 1.42) | 1.32 | (0.53, 1.32) | 0.54 | (0.28, 1.04) | 1.06 | (0.35, 1.06) |
| Discharged/Retired | 1.20 | (0.98, 1.47) | 1.50 | (0.96, 1.50) | 1.45 | (1.03, 2.05) | 2.26 | (1.13, 2.26) |
| Deployment-Related | ||||||||
| Months Since Last Return | 1.00 | (0.99, 1.01) | 1.01 | (0.99, 1.01) | 1.00 | (0.99, 1.01) | 1.02 | (1.00, 1.02) |
| Length of Last Deployment (Months) | 1.00 | (0.97, 1.03) | 1.04 | (0.98, 1.04) | 1.05 | (1.01, 1.11) | 1.10 | (1.01, 1.10) |
| Number of Traumas (0-10) | 1.06 | (1.02, 1.11) | 1.12 | (1.03, 1.12) | 1.21 | (1.10, 1.32) | 1.28 | (1.11, 1.28) |
| Seriously Injured | 0.85 | (0.53, 1.35) | 1.33 | (0.57, 1.33) | 1.86 | (1.02, 3.36) | 2.94 | (0.87, 2.94) |
| Race | ||||||||
| White (Reference) | 1.00 | 1.00 | ||||||
| Black | 0.92 | (0.68, 1.23) | 0.95 | (0.56, 1.61) | ||||
| Hispanic | 0.57 | (0.38, 0.86) | 1.15 | (0.68, 1.95) | ||||
| Other | 0.83 | (0.41, 1.69) | 0.89 | (0.44, 1.81) | ||||
| Current Marital Status | ||||||||
| Married (Reference) | 1.00 | 1.00 | ||||||
| Not Married | 1.36 | (1.04, 1.78) | 1.70 | (1.14, 2.52) | ||||
| Age (Per Decade) | 0.95 | (0.83, 1.08) | 0.69 | (0.54, 0.88) | ||||
| Rank | ||||||||
| Enlisted (Reference) | 1.00 | 1.00 | ||||||
| Officer/Warrant Officer | 1.21 | (0.97, 1.50) | 0.59 | (0.45, 0.78) | ||||
| Psychological Health | ||||||||
| PTSD Symptoms | 1.02 | (1.01, 1.03) | Not assessed in multivariate model | 1.04 | (1.03, 1.06) | Not assessed in multivariate model | ||
| Depression Symptoms | 1.04 | (1.01, 1.06) | Not assessed in multivariate model | 1.10 | (1.05, 1.14) | Not assessed in multivariate model | ||
IRR=Incident Rate Ratio; aIRR=adjusted Incident Rate Ratio
*
Multivariate models adjusted for Race, Marital Status, Rank (Enlisted vs Officer / Warrant Officer), and Age (by decade)