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. Author manuscript; available in PMC: 2010 May 1.

Published in final edited form as: J Adolesc Health. 2010 Jan 13;46(5):451–457. doi: 10.1016/j.jadohealth.2009.11.208

Table 3.

ANCOVA results for orthogonal comparisons of outcome variables, by study arms at 7-year follow-up

	30-day substance use

	Alcohol	≥5 drinks	Marijuana	Cigarettes	Alcohol refusal	Drinking friends	Peer pressure	Intentions to drink

	β (SE)	β (SE)	β (SE)	β (SE)	β (SE)	β (SE)	β (SE)	β (SE)
CD and CD_P vs. Control^a	−.48^* (.23)	−.40^* (.20)	.21 (.42)	−4.20^* (1.72)	.13^* (.06)	−.06^* (.03)	−.06^* (.03)	−.28^* (.13)
CD_P vs. CD^b	−.11 (.40)	−.13 (.36)	.72 (.73)	.48 (3.03)	−.08 (.10)	.08 (.05)	.04 (.06)	.02 (.22)
Age	.67^* (.33)	.57 (.29)	.53 (.59)	7.24^** (2.46)	−.16 (.08)	.07 (.04)	−.06 (.05)	.22 (.18)
Gender^c	.75 (.66)	.54 (.58)	1.12 (1.19)	.53 (4.92)	.10 (.16)	−.14 (.08)	.20^* (.09)	−.51 (.36)
Survey mode^d	2.36^** (.85)	.74 (.75)	3.68^* (1.53)	12.50^* (6.35)	.37 (.21)	−.16 (.11)	.17 (.12)	.07 (.47)
Baseline	1.78^* (.71)	2.38 (1.95)	.85 (1.40)	−.68 (1.91)	.24 (.15)	.20^** (.08)	−.08 (.13)	.44^** (.14)

Coefficients are unstandardized.

^*

p < .05;

^**

p < .01.

^a

Contrast code = 1, 1, −2, respectively for CD, CD_P, and control arms.

^b

Contrast code = 1, −1, 0, respectively for CD, CD_P, and control arms.

^c

Dummy code = 0, 1, respectively for female and male.

^d

Dummy code = 0, 1, respectively for online or telephone.