Figure 5.

Mean values for Generalized Anxiety Disorder Scale-7 (GAD-7; with 95% CI) predicted by significant fixed effects in the fitted longitudinal model of GAD-7 versus week in study and days played. For fixed effects, only an interaction of days played × linear week in study was retained as significant (P=.05), whereby GAD-7 values were predicted by the model to remain essentially stable across time when the number of days played was relatively low (below 10) but showed an increasingly steep linear decline across time when the numbers of days played was increasingly high. Predicted values for GAD-7 are shown at selected illustrative strata of number of days played ranging from the minimum observed value of 2 up to the maximum observed value of 57 and at equally spaced intervals in between.