Table 4.
Unadjusted association between baseline characteristics and Peer Booster engagement.
| Predictors | Peer Boosters | ||||||||||||||||||||||
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0 (n=76) | 1 or 2 (n=27) | 3 (n=142) | Test statistic (df) | P value | Effect sizea | |||||||||||||||||
| Follow-up completion, n (%) | |||||||||||||||||||||||
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4 months | 31 (17.42) | 17 (9.55) | 130 (73.03) | χ22=65.6 | <.001 | .52 | ||||||||||||||||
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8 months | 36 (19.57) | 20 (10.87) | 128 (69.57) | χ22=48.4 | <.001 | .44 | ||||||||||||||||
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12 months | 33 (18.97) | 16(9.20) | 125 (71.84) | χ22=49.9 | <.001 | .45 | ||||||||||||||||
| Baseline characteristics | |||||||||||||||||||||||
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Sex (male), n (%) | 57 (27.80) | 22 (10.73) | 126 (61.73) | χ22=6.9 | .03 | .17 | ||||||||||||||||
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Age, mean (SD) | 26.8 (6.2) | 26.9 (8.1) | 28.6 (6.9) | F1,244=4.08 | .04 | .02 | ||||||||||||||||
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Race, n (%) | χ22=6.1 | .05 | .16 | |||||||||||||||||||
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White | 68 (32.38) | 19 (9.05) | 123 (58.57) |
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Other | 8 (22.86) | 8 (22.86) | 19 (54.29) |
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Hispanic (yes), n (%) | 11 (31.43) | 4 (11.43) | 20 (57.14) | χ22=0.0 | .99 | .01 | ||||||||||||||||
| Marital status, n (%) | χ26=17.3 | .008 | .19 | ||||||||||||||||||||
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Married | 16 (25.00) | 3 (4.69) | 45 (70.31) |
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Living together | 16 (6.53) | 7 (21.88) | 9 (28.13) |
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Widowed, divorced, or separated | 8 (25.00) | 4 (12.50) | 20 (62.50) |
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Never married | 36 (30.77) | 13 (11.11) | 68 (58.12) |
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| Highest grade completed, n (%) | χ24=7.7 | .10 | .13 | ||||||||||||||||||||
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High school or less | 18 (40.91) | 4 (9.09) | 22 (50.00) |
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Some college | 45 (31.91) | 19 (13.48) | 77 (54.61) |
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College or more | 13 (21.67) | 4 (6.67) | 43 (71.67) |
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| Rank, n (%) | χ24=4.2 | .37 | .09 | ||||||||||||||||||||
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E1-E4 | 45 (33.09) | 18 (13.24) | 73 (53.68) |
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E5-E9 | 29 (29.90) | 7 (7.22) | 61 (62.89) |
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WO1-WO5/O1-O9 | 2 (16.67) | 2 (16.67) | 8 (66.67) |
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| Employed (yes), n (%) | 69 (33.82) | 19 (9.31) | 116 (56.86) | χ22=6.5 | .04 | .16 | |||||||||||||||||
| Household income (US $), n (%) | χ26=12.0 | .06 | .16 | ||||||||||||||||||||
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25,000 or less | 28 (37.33) | 9 (12.00) | 38 (50.67) |
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25,000-50,000 | 27 (36.00) | 8 (10.67) | 40 (53.33) |
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50,000 or more | 18 (21.18) | 7 (8.24) | 60 (70.59) |
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Refused | 3 (30.00) | 3 (30.00) | 4 (40.00) |
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| Ever deployed (yes), n (%) | 30 (25.00) | 10 (8.33) | 80 (66.67) | χ22=7.3 | .03 | .17 | |||||||||||||||||
| Trauma exposure (yes), n (%) | 26 (27.08) | 10 (10.42) | 60 (62.50) | χ22=1.4 | .50 | .08 | |||||||||||||||||
| Illicit drug use (yes), n (%) | 4 (33.33) | 1 (8.33) | 7 (58.33) | χ22=0.1 | .95 | .02 | |||||||||||||||||
| Cannabis use (yes), n (%) | 10 (30.30) | 5 (15.15) | 18 (54.55) | χ22=0.6 | .71 | .05 | |||||||||||||||||
| AUDITb, mean (SD) | 8.9 (5.1) | 9.4 (5.5) | 10.2 (6.1) | F1,244=2.75 | .10 | .01 | |||||||||||||||||
| PHQc, mean (SD) | 4.4 (4.9) | 6.0 (4.9) | 6.2 (6.0) | F1,244=4.72 | .03 | .02 | |||||||||||||||||
| GADd, mean (SD) | 4.8 (4.9) | 6.9 (4.5) | 6.7 (5.9) | F1,244=5.43 | .02 | .02 | |||||||||||||||||
| Drink and drive, mean (SD) | 0.3 (0.6) | 0.1 (0.4) | 0.3 (0.7) | F1,244=0.84 | .36 | <.01 | |||||||||||||||||
| Readiness to change, mean (SD) | 3.9 (3.0) | 3.9 (3.2) | 3.5 (2.9) | F1,244=0.98 | .32 | <.01 | |||||||||||||||||
| Confidence reduction, mean (SD) | 4.5 (3.1) | 4.4 (3.5) | 4.0 (3.0) | F1,244=1.09 | .30 | <.01 | |||||||||||||||||
| SIPe-Impulse control, mean (SD) | 1.0 (1.3) | 1.2 (1.2) | 1.0 (1.6) | F1,244=0.24 | .96 | <.01 | |||||||||||||||||
| Motives to drink, mean (SD) | |||||||||||||||||||||||
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Social | 5.4 (2.4) | 5.3 (2.2) | 5.4 (2.5) | F1,244=0.02 | .88 | <.01 | ||||||||||||||||
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Coping with anxiety | 3.8 (2.1) | 4.4 (2.5) | 4.1 (2.2) | F1,244=1.19 | .28 | <.01 | ||||||||||||||||
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Coping with depression | 5.0 (2.5) | 5.8 (3.4) | 5.1 (2.9) | F1,244=0.02 | .89 | <.01 | ||||||||||||||||
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Enhancement | 3.8 (2.1) | 5.1 (2.2) | 4.3 (2.3) | F1,244=2.01 | .16 | .01 | ||||||||||||||||
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Conformity | 2.6 (1.5) | 2.9 (1.5) | 2.8 (1.7) | F1,244=0.47 | .49 | <.01 | ||||||||||||||||
|
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Physical | 4.5 (1.9) | 4.9 (2.1) | 4.6 (2.4) | F1,244=0.04 | .83 | <.01 | ||||||||||||||||
aEffect size reported as Cramer V for chi-square tests and as R-square for F tests.
bAUDIT: Alcohol Use Disorders Identification Test.
cPHQ: Patient Health Questionnaire.
dGAD: General Anxiety Disorder Questionnaire.
eSIP: Short Index of Problems.