Figure 3. Predictor effect plot for Tinnitus Handicap Inventory (THI) score obtained from the linear model and analysis of variance Wald test.
The following predictive variables for THI were statistically significant: sex (p < 0.01), pure-tone average (PTA; p = 0.03), overall Spanish Tinnitus Functional Inventory (Sp-TFI) score (p = 0.02), and Sp-TFI Sleep (SL), Relaxation (R) and Auditory (A) subscale scores (p = 0.03, p = 0.03 and p < 0.01 respectively). The blue lines are the regression lines between the variables, and the areas shaded blue indicate the confidence band (95% confidence intervals).