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Table 3 Multilevel model results for short-term effects

From: Preventing alcohol use with a universal school-based intervention: results from an effectiveness study

 

Alcohol use

Alcohol Attitudes

PBC

AEQ-A

Fixed parameters

    

Intercept

0.45 (0.07)*

2.49 (0.07)*

2.24 (0.05)*

2.59 (0.06)*

Group

−0.08 (0.12)

0.17 (0.11)

−0.07 (0.08)

0.32 (0.09)

Time

0.21 (0.09)*

−0.26 (0.05)*

−0.14 (0.05)*

−0.16 (0.05)*

Group x Time

−0.00 (0.14)

−0.14 (0.08)

−0.07 (0.08)

−0.22 (0.08)*

Random parameters

    

Level 1 Within subjects

4.19 (0.11)*

1.05 (0.03)*

1.09 (0.03)*

0.99 (0.03)*

Level 2 Between subjects

0.86 (0.09)*

1.18 (0.06)*

0.55 (0.04)*

0.88 (0.05)*

Level 3 Between classes

0.04 (0.03)

0.19 (0.04)*

0.03 (0.01)*

0.11 (0.03)*

  1. Note. *p < .05. Parameter estimates and standard errors (in parentheses). Intervention group = 1, Control group = 0. Time measured after four months.