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. 2016 Apr 21;18(4):e93. doi: 10.2196/jmir.5223

Table 2.

Mean and bootstrapped median costs per adolescent measured at T1 covering a 4-month period between T0 and T1 (€, 2014) and zscores per cost category.

Type of costs Intervention group (€) Control group (€) Skewness (z score) b

Mean (SD) Median (σ 2) a Mean (SD) Median (σ 2) a
Intervention costs 53.00 (0.00) 53.00 (0.00)


Health care costs





General practitioner 25.42 (3.39) 25.22 (11.49) 23.84 (4.36) 23.50 (11.49) 73.44

Emergency care 10.16 (3.14) 10.06 (9.86) 8.08 (3.74) 7.65 (13.99) 97.98

Hospital stays 27.22 (12.38) 26.88 (135.26) 67.90 (58.94) 66.98 (3473.92) 258.45

Ambulance rides 7.34 (2.95) 6.74 (8.70) 9.37 (6.18) 8.64 (38.19) 174.83

Mental health care 16.07 (6.37) 15.59 (40.58) 14.16 (5.72) 13.78 (32.71) 115.83

Total health care costs 85.65 (20.62) 84.89 (425.18) 124.49 (67.91) 120.38 (4611.76) 229.86
Total health care perspective 139.16 (20.77) 138.04 (431.39) 127.45 (68.64) 122.12 (4711.45) 229.09
Educational sector costs





School absenteeism 51.88 (7.13) 51.44 (50.84) 66.77 (11.03) 65.74 (121.66) 76.31

Attendance officer 0.03 (0.03) 0.04 (0.00) 2.53 (2.16) 2.40 (4.67) 272.90

Total educational sector costs 51.52 (7.16) 51.17 (51.27) 69.30 (11.35) 68.37 (128.82) 74.60
Labor and social security costs





Work absenteeism 9.67 (3.49) 9.20 (12.18) 6.03 (1.41) 6.01 (1.99) 140.85

Total labor and social security costs 9.63 (3.39) 9.30 (11.49) 6.09 (1.40) 6.01 (1.96) 140.85
Household and leisure costs





Failure to perform household activities 8.58 (3.01) 8.31 (9.06) 10.92 (3.39) 10.74 (11.49) 98.06

Failure to perform other activities 25.77 (13.20) 24.67 (174.24) 8.17 (1.60) 8.02 (2.56) 182.19

Youth and family center 0.00 (0.00) 0.00 (0.00) 0.33 (0.34) 0.33 (0.12) 282.45

Family care 1.26 (1.27) 1.49 (1.61) 0.18 (0.18) 0.19 (0.03) 270.73

Total household and leisure costs 35.38 (14.80) 33.55 (219.04) 19.23 (4.21) 18.81 (17.72) 163.43
Criminal justice system costs





Police services 4.68 (2.61) 4.45 (6.81) 6.67 (2.50) 6.47 (6.25) 126.44

Youth police services 1.58 (1.72) 1.91 (2.96) 0.28 (0.20) 0.28 (0.04) 277.89

Court proceedings 55.10 (34.45) 50.92 (1186.80) 9.95 (7.39) 10.15 (54.61) 197.40

Child protection services 0.29 (0.31) 0.36 (0.10) 0.68 (0.72) 0.72 (0.52) 227.11

Child health protection services 3.13 (3.73) 4.06 (13.91) 0.46 (0.45) 0.48 (0.20) 277.12

Total criminal justice system costs 66.32 (38.43) 61.51 (1476.86) 18.77 (9.79) 17.40 (95.84) 182.55
Total intersectoral costs 162.68 (41.85) 158.61 (1751.42) 112.61 (18.83) 111.26 (354.57) 124.84
Substance use costs





Cigarettes 30.68 (6.25) 30.46 (39.06) 18.82 (3.94) 18.82 (15.52) 48.86

Soft drugs 4.30 (1.95) 4.00 (3.80) 5.44 (3.01) 5.12 (9.06) 153.72

Hard drugs 1.15 (1.08) 1.32 (1.17) 0.20 (0.11) 0.19 (0.01) 275.97

Total costs of substance use 36.30 (7.58) 36.09 (57.46) 24.64 (5.85) 24.30 (34.22) 61.42
Total societal perspective 336.45 (53.31) 331.41 (2841.96) 263.52 (70.70) 255.75 (4998.49) 135.60

aThe presented median cost is the 50 thpercentile of 1000 bootstrap replications.

bThe zscore for each cost category is positive and higher than the reference value of 1.96 [ 44] indicating that costs were skewed and tailed to the right.