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. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: Addiction. 2013 Dec 10;109(6):977–985. doi: 10.1111/add.12399

Table 2.

Class size and mean parental monitoring (N=514)

Stable Declining P value
Membership (%) 84.9 15.1 --

Parental Monitoring
 Age 11 4.96 4.52 .001
 Age 12 5.07 4.15 <.001
 Age 13 5.00 3.95 <.001
 Age 14 4.97 3.70 <.001
 Intercept 5.01*** 3.98*** <.001
 Slope −0.01 −0.27* <.001
*

p<.05,

**

p<.01,

***

p<.001