Means and standard deviations at wave 1 were calculated for SAD (mean=.375, SD=.356), GAD (mean=.666, SD=.454), SoPh (mean=.779, SD=.427), PD (mean=.428, SD=.363), and OCD (mean=.597, SD=.445). Means and standard deviations were also calculated for wave 2 SAD (mean=.236, SD=.291), GAD (mean=.485, SD=.427), SoPh (mean=.684, SD=.465), PD (mean=.301, SD=.321), and OCD (mean=.339, SD=.348). Means reflect mean item scores for each RCADS scale.
Correlations among wave 1 RCADS scale scores for each sex separately are presented in Table . It is shown that all correlations were in a close range, almost similar across sexes, and generally above .50 which can be regarded as high (Cohen, 1988
). For both sexes the highest correlations were found between PD and OCD (r
=.61 in boys and girls), and the lowest between SAD and OCD (boys r
=.47; girls r
Correlations among wave 1 RCADS scale scores
Correlations between wave 1 and wave 2 RCADS scale scores can be found in Table . For instance, in boys, the correlation between wave 1 and wave 2 SAD scores was .30, whereas the correlations between wave 1 GAD, SoPh, and PD scores and wave 2 SAD scores were .27, .29, and .22 respectively. Hence, heterotypic correlations were almost as high as the homotypic correlation. In girls, a similar result was found for wave 2 SAD. Heterotypic correlations ranged between .27 and .29, whereas the homotypic correlation was .38. Similar relatively small discrepancies between homotypic and heterotypic correlations were found for wave 2 GAD, SoPh, and PD scores.
Correlations between wave 1 and wave 2 RCADS scale scores
The results of the regression analyses are presented in Tables and . Analyses that were aimed at assessing specific homotypic continuity (Table ) indicated that variances reflecting homotypic continuity were 2.3% for SAD, 3.6% for GAD, 3.7% for SoPh, 3.2% for PD, and .9% for OCD. Analyses aimed as specifically investigating heterotypic continuity revealed variances of 2.0% for SAD, 4.2% for GAD, 1.3% for SoPh, 2.3% for PD, and 2.7% for OCD (Table ).
Specific homotypic continuity (prediction by target scale). Prediction of wave 2 RCADS scale scores by wave 1 scale scores and sex
Specific heterotypic continuity (prediction by non-target scales). Prediction of wave 2 RCADS scale scores by wave 1 scale scores and sex
In analyses aimed at homotypic continuity, some anxiety*sex interactions were significant. A marked sex difference was found for PD. Table shows that homotypic continuity was much stronger for girls (homotypic R2=6.0%) than for boys (homotypic R2=2.0%).