Table 3.

Mean, SD, and planned comparisons on State-Trait Anxiety Inventory scores over the duration of the study (T0, T1, T2, and T3) in the intervention and waitlist control groups.

Time point	STAI-S-6a: planned comparisons
	Intervention group				Waitlist control
	Mean (SD)	t test (df)	P value	Effect size, d	Mean (SD)	t test (df)	P value	Effect size, d
T0—baseline	51.71 (10.78)	N/Ab	N/A	N/A	49.81 (10.96)	N/A	N/A	N/A
T1—week 2	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
T2—week 4	46.31 (11.32)	3.507 (54)	<.001	0.67	51.33 (10.35)	−1.449 (60)	.15	0.26
T3—week 6	44.95 (12.52)	4.35 (58)	<.001	0.81	47.61 (13.29)	1.542 (63)	.13	0.27

^aSTAI-S-6: State-Trait Anxiety Inventory.

^bN/A: not applicable.