Categorical student outcomes	Control n (%)	Intervention n (%)	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value
Ever smoked
No	2293 (77.70)	2318 (84.17)	0.59 (0.43 to 0.81)	0.001	0.58 (0.43 to 0.80)	0.001	0.55 (0.39 to 0.78)	0.001	0.57 (0.40 to 0.81)	0.002	0.65 (0.44 to 0.97)	0.037
Yes	658 (22.30)	436 (15.83)	0.59 (0.43 to 0.81)	0.001	0.58 (0.43 to 0.80)	0.001	0.55 (0.39 to 0.78)	0.001	0.57 (0.40 to 0.81)	0.002	0.65 (0.44 to 0.97)	0.037
Ever drunk alcohol
No	1677 (56.43)	1735 (62.43)	0.75 (0.58 to 0.79)	0.029	0.72 (0.56 to 0.92)	0.009	0.72 (0.55 to 0.95)	0.019	0.74 (0.56 to 0.97)	0.028	0.76 (0.53 to 1.09)	0.134
Yes	1295 (43.57)	1044 (37.57)	0.75 (0.58 to 0.79)	0.029	0.72 (0.56 to 0.92)	0.009	0.72 (0.55 to 0.95)	0.019	0.74 (0.56 to 0.97)	0.028	0.76 (0.53 to 1.09)	0.134
Ever been really drunk
No	788 (53.14)	721 (61.21)	0.50 (0.29 to 0.87)	0.014	0.47 (0.31 to 0.71)	<0.001	0.42 (0.27 to 0.65)	<0.001	0.47 (0.31 to 0.71)	<0.001	0.66 (0.47 to 0.93)	0.019
Yes	695 (46.86)	457 (38.79)	0.50 (0.29 to 0.87)	0.014	0.47 (0.31 to 0.71)	<0.001	0.42 (0.27 to 0.65)	<0.001	0.47 (0.31 to 0.71)	<0.001	0.66 (0.47 to 0.93)	0.019
Ever been offered illicit drugs
No	1913 (64.41)	1997 (72.54)	0.52 (0.34 to 0.79)	0.002	0.51 (0.36 to 0.73)	<0.001	0.44 (0.30 to 0.64)	<0.001	0.51 (0.36 to 0.73)	<0.001	0.70 (0.50 to 0.96)	0.028
Yes, but did not try	744 (25.05)	567 (20.60)
Yes, and tried them	313 (10.54)	189 (6.87)
Used contraception at last sexual intercourse
No	64 (23.10)	36 (21.95)	1.18 (0.56 to 2.48)	0.658	1.08 (0.50 to 2.35)	0.841	1.60 (0.65 to 3.91)	0.305	1.34 (0.56 to 3.22)	0.511	1.40 (0.64 to 3.06)	0.405
Yes	213 (76.90)	128 (78.05)	1.18 (0.56 to 2.48)	0.658	1.08 (0.50 to 2.35)	0.841	1.60 (0.65 to 3.91)	0.305	1.34 (0.56 to 3.22)	0.511	1.40 (0.64 to 3.06)	0.405
Use of NHS in past 12 months
No	1605 (53.22)	1472 (52.59)	0.96 (0.83 to 1.12)	0.639	0.96 (0.82 to 1.11)	0.565	0.96 (0.81 to 1.13)	0.600	0.99 (0.84 to 1.17)	0.916	0.96 (0.82 to 1.13)	0.613
Yes	1411 (46.78)	1327 (47.41)	0.96 (0.83 to 1.12)	0.639	0.96 (0.82 to 1.11)	0.565	0.96 (0.81 to 1.13)	0.600	0.99 (0.84 to 1.17)	0.916	0.96 (0.82 to 1.13)	0.613
Contact with police
No	2626 (86.52)	2485 (88.43)	0.75 (0.57 to 0.99)	0.041	0.74 (0.56 to 0.97)	0.027	0.66 (0.49 to 0.88)	0.004	0.72 (0.54 to 0.95)	0.022	0.94 (0.73 to 1.21)	0.641
Yes	409 (13.48)	325 (11.57)	0.75 (0.57 to 0.99)	0.041	0.74 (0.56 to 0.97)	0.027	0.66 (0.49 to 0.88)	0.004	0.72 (0.54 to 0.95)	0.022	0.94 (0.73 to 1.21)	0.641

CHU9D, Chuld Health Utility 9D NHS National Health Service; ESYTC, Edinburgh Study of Youth Transitions and Crime; GBS, Gatehouse Bullying Scale; PedsQL, Pediatric Quality of Life Inventory; SDQ, Strengths and Difficulties Questionnaire; SWEMWBS, Short Warwick Edinburgh Mental Wellbeing Scale; MAS, Modified Aggression Scale;