Table 3.

Effects of MBSR on Trails B/A ratio and IgG anti-KLH antibody response

	MBSR mean	WLC mean	p value	Effect size
MAAS scores
Baseline	5.08	5.30	0.017	−0.29
8 weeks	5.21	5.28	0.500	−0.08
11 weeks	5.53	5.39	0.153	0.18
32 weeks	5.46	5.27	0.023	0.25
Trails B/A ratio
Baseline	2.01	1.89	0.281	−0.06
8 weeks	1.75	2.01	0.04	− 0.24
11 weeks	2.37	2.43	0.666	0.05
32 weeks	1.89	1.98	0.507	0.08
IgG (absorbance)
8 weeks	0.172	0.104	0.007	0.18
11 weeks	0.203	0.256	0.293	−0.14
32 weeks	0.143	0.223	0.036	− 0.22

Group differences with p < 0.05 are in italics. Week 8 = Immediately after intervention, at the time of KLH challenge. Effect size is Cohen's d and is the difference between treatment and control group at each time point, expressed in standard deviation units; analyses are adjusted for MAAS, CES-D, and PSS scores at baseline.