Table 1.

Generalized Estimating Equations determine preliminary IPT-P pilot outcomes

Dependent Variable	Baseline Mean (SD)	12-weeks Mean (SD)	24-weeks Mean (SD)	36-weeks Mean (SD)
	(n = 17)	(n = 12)	(n = 11)	(n = 9)	% change	z	p	effect size
HRSD-17	20.2 (4.9)	11.8 (5.3)	15.3 (5.9)	11.6 (6.0)	42.7	−4.43	<.001	1.57
BDI	29.0 (8.0)	25.0 (7.0)	22.0 (7.0)	19.6 (11.4)	32.6	−4.11	<.001	.96
SAS-SR	2.7 (0.4)	2.4 (1.2)	2.8 (0.5)	2.3 (0.6)	14.8	−2.12	.03	.77
MPI Pain Interference	4.4 (1.4)	4.3 (1.3)	4.7 (1.0)	4.3 (1.3)	2.3	−1.07	.28	.13

Notes. BDI: Beck Depression Inventory; HRSD-17: Hamilton Rating Scale for Depression – 17 items; SAS-SR: Social Adjustment Scale - Self-Report; MPI:Multidimensional Pain Inventory; analyses controlled for baseline antidepressant medication use; pain and social adjustment analyses also controlled for baseline HRSD-17.