Table 1.
General characteristics and baseline health behaviors and well-being of adolescents for the intervention groups and control group (N=1256).
| Characteristics | E-health4Uth n=392 |
E-health4Uth + consult n=430 |
Control n=434 |
P value | |||
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E-health4Uth vs control | E-health4Uth + consult vs control | ||
| Number of school classes | 27 | 26 | 25 |
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| Age (years), mean (SD) | 15.84 (0.70) | 15.95 (0.70) | 15.79 (0.66) | .28 | <.001a | ||
| Gender, n (%) |
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Male | 223 (56.9) | 241 (56.0) | 223 (51.4) | .11 | .17b | |
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Female | 169 (43.1) | 189 (44.0) | 211 (48.6) |
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| Ethnicity, n (%) |
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Dutch | 311 (79.3) | 320 (74.4) | 326 (75.1) | .15 | .81b | |
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Non-Dutch | 81 (20.7) | 110 (25.6) | 108 (24.9) |
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| Educational level, n (%) |
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Vocational training | 191 (48.7) | 231 (53.7) | 212 (48.8) | .97 | .15b | |
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Preuniversity | 201 (51.3) | 199 (46.3) | 222 (51.2) |
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| Alcohol consumption |
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5 or more drinks on 1 occasion in the past 4 weeks, n (%) |
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0 times | 255 (65.1) | 272 (63.4) | 292 (67.6) | .48c | .20c |
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1 times | 962 (15.8) | 69 (16.1) | 62 (14.4) |
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2 times | 36 (9.2) | 36 (8.4) | 34 (7.9) |
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3-4 times | 22 (5.6) | 35 (8.2) | 29 (6.7) |
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5 or more times | 17 (4.3) | 17 (4.0) | 15 (3.5) |
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Have been drunk or tipsy in the past 4 weeks, n (%) |
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0 times | 290 (74.0) | 318 (74.1) | 333 (77.1) | .28c | .30c |
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1 times | 54 (13.8) | 60 (14.0) | 53 (12.3) |
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2 times | 21 (5.4) | 22 (5.1) | 24 (5.6) |
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3 or more times | 27 (6.9) | 29 (6.8) | 22 (5.1) |
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| Smoking, n (%) |
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No | 329 (83.9) | 352 (82.1) | 352 (81.5) | .39c | .92c | |
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Less than once a week | 13 (3.3) | 16 (3.7) | 19 (4.4) |
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At least once a week, but not every day | 15 (3.8) | 14 (3.3) | 20 (4.6) |
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Every day | 35 (8.9) | 47 (11.0) | 41 (9.5) |
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| Drug use (past 4 weeks), n (%) |
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0 times | 274 (95.4) | 402 (93.7) | 397 (91.9) | .04b | .31b | |
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1 or more times | 18 (4.6) | 27 (6.3) | 35 (8.1) |
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| Condom use during intercourse (n=324), n (%) |
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Always | 52 (53.1) | 68 (52.3) | 49 (51.0) | .50c | .55c | |
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Usually | 21 (21.4) | 25 (19.2) | 15 (15.6) |
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Sometimes/almost never | 14 (14.3) | 25 (19.2) | 18 (18.8) |
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Never | 11 (11.2) | 12 (9.2) | 14.6 (14) |
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| Well-being, mean (SD) d |
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SDQ score | 10.06 (5.57) | 9.75 (5.14) | 9.91 (5.32) | .69a | .67a | |
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CHQ-CF-GH4 score | 71.39 (17.87) | 71.62 (18.49) | 73.67 (17.78) | .07a | .10a | |
aIndependent-samples t test.
bChi-square test.
cMann-Whitney U test.
dSDQ: Strengths and Difficulties Questionnaire (higher score indicates more mental health problems; range 0-40); CHQ-CF-GH4: Child Health Questionnaire-Child Form-General Health (higher score indicates a better health-related quality of life; range 0-100).