Table 3.
Unadjusted association between baseline characteristics and Web Booster engagement.
| Predictors | Web Boosters | |||||||||||||||||||
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0 (n=95) | 1 or 2 (n=43) | 3 (n=108) | Test statistic (df) | P value | Effect sizea | ||||||||||||||
| Follow-up completion, n (%) | ||||||||||||||||||||
|
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4 months | 31 (17.61) | 37 (21.02) | 108 (61.36) | χ22=118.0 | <.001 | .69 | |||||||||||||
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8 months | 35 (20.00) | 34 (19.43) | 106 (60.57) | χ22=94.1 | <.001 | .62 | |||||||||||||
|
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12 months | 37 (21.14) | 36 (20.57) | 102 (58.29) | χ22=79.8 | <.001 | .57 | |||||||||||||
| Baseline characteristics | ||||||||||||||||||||
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Sex (male), n (%) | 86 (41.55) | 34 (16.07) | 87 (42.03) | χ22=4.7 | .09 | .14 | |||||||||||||
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Age, mean (SD) | 27.4 (7.5) | 27.9 (7.4) | 30.5 (7.7) | F1,244=8.54 | .004 | .03 | |||||||||||||
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Race, n (%) | χ22=1.1 | .57 | .07 | ||||||||||||||||
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White | 77 (40.10) | 34 (17.71) | 81 (42.19) |
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Other | 18 (33.33) | 9 (16.67) | 27 (50.00) |
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Hispanic (yes), n (%) | 13 (48.15) | 3 (11.11) | 11 (40.74) | χ22=1.4 | .48 | .08 | |||||||||||||
| Marital status, n (%) | χ26=2.4 | .87 | .07 | |||||||||||||||||
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Married | 25 (33.33) | 13 (17.33) | 37 (49.33) |
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Living together | 16 (38.10) | 7 (16.67) | 19 (45.24) |
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Widowed, divorced, or separated | 10 (35.71) | 5 (17.86) | 13 (46.43) |
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Never married | 44 (43.56) | 18 (17.82) | 39 (38.61) |
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| Highest grade completed, n (%) | χ24=26.1 | <.001 | .23 | |||||||||||||||||
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High school or less | 30 (58.82) | 9 (17.65) | 12 (23.53) |
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Some college | 54 (40.60) | 25 (18.80) | 54 (40.60) |
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College or more | 11 (17.74) | 9 (14.52) | 42 (67.74) |
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| Rank, n (%) | χ24=19.1 | <.001 | .20 | |||||||||||||||||
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E1-E4 | 60 (45.11) | 29 (21.80) | 44 (33.08) |
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E5-E9 | 31 (32.98) | 14 (14.89) | 49 (52.13) |
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WO1-WO5/O1-O9 | 4 (21.05) | 0 (0) | 15 (78.95) |
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|
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| Employed (yes), n (%) | 81 (36.99) | 40 (18.26) | 98 (44.75) | χ22=2.4 | .22 | .10 | ||||||||||||||
| Household income (US $), n (%) | χ26=19.1 | .004 | .20 | |||||||||||||||||
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25,000 or less | 29 (46.48) | 10 (15.38) | 26 (40.00) |
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25,000-50,000 | 33 (24.49) | 12 (16.90) | 26 (36.62) |
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50,000 or more | 24 (24.49) | 19 (19.39) | 55 (56.12) |
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Refused | 9 (75.00) | 2 (16.67) | 1 (8.33) |
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| Ever deployed (yes), n (%) | 45 (37.19) | 23 (19.01) | 53 (43.80) | χ22=0.4 | .80 | .04 | ||||||||||||||
| Trauma exposure (yes), n (%) | 21(26.25) | 17 (21.25) | 42 (52.50) | χ22=7.6 | .02 | .18 | ||||||||||||||
| Illicit drug use (yes), n (%) | 7 (26.92) | 8 (30.77) | 11 (42.31) | χ22=3.9 | .14 | .13 | ||||||||||||||
| Cannabis use (yes), n (%) | 14 (50.00) | 5 (17.86) | 9 (32.14) | χ22=2.0 | .36 | .09 | ||||||||||||||
| AUDITb, mean (SD) | 9.4 (5.4) | 9.3 (5.8) | 9.6 (5.8) | F1,244=0.08 | .77 | <.01 | ||||||||||||||
| PHQc, mean (SD) | 5.1(6.0) | 6.0 (5.4) | 5.1 (5.8) | F1,244=0.00 | .99 | <.01 | ||||||||||||||
| GADd, mean (SD) | 5.7 (5.5) | 6.7 (5.3) | 5.1 (5.3) | F1,244=0.71 | .40 | <.01 | ||||||||||||||
| Drink and drive, mean (SD) | 0.3 (0.7) | 0.3 (0.8) | 0.3 (0.7) | F1,244=0.09 | .77 | <.01 | ||||||||||||||
| Readiness to change, n (%) | 4.1 (3.0) | 3.9 (2.9) | 3.9 (2.9) | F1,244=0.23 | .63 | <.01 | ||||||||||||||
| Confidence reduction, n (%) | 5.1 (3.0) | 4.5 (2.9) | 4.4 (3.3) | F1,244=2.19 | .13 | .01 | ||||||||||||||
| SIPe-Impulse control, n (%) | 1.0 (1.5) | 1.2 (1.6) | 1.1(1.6) | F1,244=0.24 | .63 | <.01 | ||||||||||||||
| Motives to drink, mean (SD) | ||||||||||||||||||||
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Social | 4.6 (2.3) | 5.4 (2.3) | 5.1 (2.4) | F1,244=2.01 | .16 | .01 | |||||||||||||
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Coping with anxiety | 3.7 (2.1) | 4.0 (2.1) | 3.9 (2.3) | F1,244=0.36 | .55 | <.01 | |||||||||||||
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Coping with depression | 4.8 (2.8) | 5.3 (2.1) | 5.3 (3.0) | F1,244=1.32 | .25 | .01 | |||||||||||||
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Enhancement | 4.1 (2.3) | 4.5 (2.0) | 4.1 (2.0) | F1,244=0.00 | .96 | <.01 | |||||||||||||
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Conformity | 2.6 (1.6) | 2.6 (1.6) | 2.7 (1.5) | F1,244=0.21 | .65 | <.01 | |||||||||||||
|
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Physical | 4.4 (2.3) | 4.6 (1.9) | 4.5 (2.1) | F1,244=0.15 | .70 | <.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.