Table 4. Data from the State-Trait Anxiety Inventory (STAI)) applied to 40 patients with fibromyalgia and 40 controls in São Paulo.

Anxiety variable	Control group	Test group	"t" test
	Mean ± SD	Mean ± SD	t	p
Anxiety-state	35.13 ± 12.11	51.88 ± 11.68	6.30	0.00
Anxiety-trait	36.78 ± 9.44	53.18 ± 12.6	6.60	0.00

For α = 0.05, "t" (t _α/2) = 2.10.