Table 2. Illustration of the interaction between health anxiety and general anxiety at measurement 1 in predicting the change in general anxiety from measurement 1 to measurement 4.

HAQ	STAI-S	Fall in STAI-S
Lower (6)	Lower (25)	2.2
Higher (24)	Lower (25)	−5.3 (a rise)
Lower (6)	Higher (46.5)	7.6
Higher (24)	Higher (46.5)	3.9

Note: The values for health anxiety (HAQ, Health Anxiety Questionnaire) and general anxiety (STAI-S, State Trait Anxiety Inventory (state)) are the mean observed values for the lowest two-thirds and the highest one-third of the study distribution, respectively. The change in STAI-S is calculated from the general linear model described in the text.